Earth Pulse Monthly · September 2026 · Baner, Pune

September 2026 in Baner — Air, Birds & Weather

Generated from 19,513+ sensor readings · Published

Baner Hill, First of September 2026 (1 Sept 2026, 17:43 IST)
📷 First photo · 1 Sept 2026, 17:43 IST
Baner Hill, Last of September 2026 (29 Sept 2026, 14:02 IST)
📷 Last photo · 29 Sept 2026, 14:02 IST

In , Baner (Pune) recorded an average EU AQI of 33.5 (hazier than August 2026); temperatures from 20.8 to 34 °C; 45.8 mm of rain with 2 rainy days (2.5 mm or more) and 42 confirmed bird species from 1,226 BirdNET detections (confidence 0.70 or higher).

September 2026 at a glance (screenshot and share)

🌿 Earth Pulse · Baner, PuneSEPTEMBER 2026
September 2026: a mostly healthy month for Baner
33.5Avg AQI (EU)
26.1°CAvg temperature
45.8 mmRain · 2 rainy days
42Confirmed species
1,226Confirmed detections
14 / 30Clean-air days (EU AQI)
Observing the Earth, over time · www.earth-pulse.org⚡ Pulse Score 76
📲 WhatsApp ✕ Share in LinkedIn

The month in numbers

Key facts: September 2026 in Baner, Pune

Average AQI (EU scale)
33.5average of daily means; range 10-96; lower is cleaner
Clean days (worst AQI 40 or below)
14of 30 complete days
High-pollution days (worst AQI 61 or above)
8of 30 complete days
Temperature range
20.8-34 °Caverage 26.1 °C (Baner Weather Union station readings)
Rain
45.8 mm2 rainy days (2.5 mm or more); 11 days with 0.3 mm or more
Average humidity
79%average of daily means
Confirmed bird species (0.70 or higher)
421226 confirmed detections
Candidate bird species (all detections)
12415625 detections including lower-confidence
Peak bird hour (confirmed)
08:00 IST
Most active confirmed species
Ashy Prinia604 detections
Soundscape (mean NDSI, 0-1)
0.493median 0.536; 908 valid readings
Pulse Score
76composite of air, birds and clean days

Days run 00:00–24:00 IST. AQI is the European (EU) scale, 0–100, lower is cleaner. Bird headline numbers count detections at confidence 0.70 or higher ("confirmed").

Pulse Score 76 out of 100A ring filled to 76 percent.76

Mostly healthy month for Baner

September 2026 saw hazier air compared to previous years, with the average AQI worsening by up to 7.3 points.

Air26.6 / 40100 − average AQI 33.5
Birds30 / 30capped: 1,226 confirmed detections ÷ 8 is over 100
Days avg ≤ 4018.9 / 3063% of days had a daily-average EU AQI of 40 or below (not the clean-air-day count)

September 2026 in Baner, Pune, presented a hazier atmosphere than in recent years. The average AQI was 33.5, a significant worsening compared to August 2026's average of 16.4. This September was also warmer than previous Septembers, with an average temperature of 26.1°C, which is 2.9°C warmer than the Open-Meteo model estimate for September 2025. Rainfall was notably low, with only 45.8mm falling over 2 rainy days, a substantial decrease from the 259.5mm received in September 2025. Bird detections were also quieter, with 1226 confirmed detections compared to 2504 in August 2026. The soundscape remained similar, with a mean NDSI of 0.493.

Month on month

Compared with August 2026

September 2026 against August 2026. Red = worse for air or wildlife, green = better; rain is shown without a colour judgement. Both months use the same source (Baner station).

Average AQI (EU)
33.5
vs 16.4 in August 2026 · higher = hazier
hazier by 17.1
Clean-air days (worst hour EU AQI ≤ 40)
14
vs 31 in August 2026
fewer by 17
Temperature range
20.8–34 °C
vs 22–30.8 °C in August 2026; average 26.1 vs 24.8 °C
warmer by 1.3 °C
Rainfall
45.8 mm
vs 82 mm in August 2026; rainy days 2 vs 10
drier by 36.2 mm
Bird activity (confirmed)
1,226
detections vs 2,504 in August 2026
quieter by 1,278
Confirmed species
42
vs 46 in August 2026
fewer by 4
Pulse Score
76
vs 93 in August 2026
lower by 17

Year on year · same month

Same month last year: September 2025

Sources for temperature and rain: 2026: Baner Weather Union station readings; 2025: Open-Meteo model estimates. Air quality uses the same EU AQI source in both years.

Average AQI (EU)
33.5
vs 27.6 in September 2025 · higher = hazier
hazier by 5.9
Average temperature
26.1 °C
vs 23.2 °C in September 2025
warmer by 2.9 °C
Rainfall
45.8 mm
vs 259.5 mm in September 2025
drier by 213.7 mm
Rainy days (≥ 2.5 mm)
2
vs 19 in September 2025
fewer by 17
Birds
No data
No BirdNET data before March 2026 (this is "no data", not zero).

Caution: 2025 temperature and rain are Open-Meteo model estimates; 2026 values are Baner Weather Union station readings. Direction is shown but this mixes a model with a station and is not a trend.

The long view · ERA5 reanalysis (a model, not a station)

ERA5 reanalysis, 1980–2021, 42 years: September in context

ERA5 is a reanalysis model (Copernicus / ECMWF), not a station. It is shown beside, and never subtracted from, Open-Meteo or station values. The bias-free signal is ERA5 compared with ERA5 (early 1981-90 vs recent 2012-21).

ERA5 normal, 1981–2010 (30 years)
23.3 °C
mean; average daily max 26.9 °C, min 21 °C
Rain 166.2 mm on about 14.4 rainy days
ERA5 against itself: 1981–90 → 2012–21
+0.08 °C
mean 23.39 → 23.47 °C (decade averages)
Rain 152.2 → 215.5 mm (+63.3 mm)
ERA5 record years for September
  • Warmest: 1987 (24.41 °C mean)
  • Coolest: 1993 (22.51 °C mean)
  • Wettest: 2016 (424.5 mm)
  • Driest: 1997 (57 mm)
This month, separate series · Baner station
September 2026: average 26.1 °C, rain 45.8 mm.

Shown beside ERA5, not subtracted from it. A station near the city and a 30 km reanalysis grid measure different things, so the gap between them is not a warming figure. The bias-free change is ERA5 against itself, above.

See every September since 1980 →

Air · European AQI, 0–100

Air quality — September 2026

AQI range this month (EU scale, 0–100)
Low: 10High: 96
Avg AQI
33.5
EU scale
Days averaging ≤ 40
63%
daily-average AQI; feeds the Pulse Score
Humidity avg
79%
average of daily means
Air quality, day by day
Colour = daily-average EU AQI. ▲ = a high-pollution day (worst hour 61 or more).
Daily-average EU AQI for each day of September 2026
MonTueWedThuFriSatSun
114213318417518620
72482993310401147 high-pollution day12381318
1417152116221724182219282049 high-pollution day
2147 high-pollution day22432353 high-pollution day2455 high-pollution day254526392730
2848 high-pollution day2966 high-pollution day3068 high-pollution day
Good (0–20)Fair (21–40)Moderate (41–60)Poor (61–80)Very poor (81–100)
14 days stayed clean all day (worst hour 40 or below). Hover or tap a day for its worst hour. Lower is cleaner.

View full AQI history →

Weather · Baner station

Temperature & rain — Baner, Pune

High
34°
°C this month
Low
20.8°
°C this month
Average
26.1°
°C
Total rain
45.8
mm · 2 rainy days (≥ 2.5 mm)
Every day's low and high, September
Each bar runs from the coolest to the warmest reading of the IST day.
Daily temperature range, September 2026For each day of September 2026, a bar from the lowest to the highest temperature. Highest 34 °C on 21 September 2026; lowest 20.8 °C on 28 September 2026.20253035°C1 September 2026: 22.8–30.5 °C2 September 2026: 22.4–28.4 °C3 September 2026: 22.6–30.5 °C4 September 2026: 22.7–30.5 °C5 September 2026: 22.6–29.6 °C6 September 2026: 22.6–29.5 °C7 September 2026: 22.7–29.8 °C8 September 2026: 22.1–29.3 °C9 September 2026: 22.2–31.6 °C10 September 2026: 21.6–31.5 °C11 September 2026: 21.3–31.6 °C12 September 2026: 21.9–31.7 °C13 September 2026: 22.7–27.1 °C14 September 2026: 22.2–29.8 °C15 September 2026: 22–31.2 °C16 September 2026: 22.3–30.8 °C17 September 2026: 22.4–31.2 °C18 September 2026: 21.9–31.5 °C19 September 2026: 22.7–31.7 °C20 September 2026: 22.5–32.7 °C21 September 2026: 22.5–34 °C22 September 2026: 22.5–30.8 °C23 September 2026: 22.7–31.1 °C24 September 2026: 22.9–32 °C25 September 2026: 22.3–30.8 °C26 September 2026: 22.7–30.5 °C27 September 2026: 22.5–32.3 °C28 September 2026: 20.8–33.4 °C29 September 2026: 21.5–33.2 °C30 September 2026: 21.3–30.5 °Chigh 34 °Clow 20.8 °C18152229
Show the numbers
Every day's low and high, September
DayLow °CHigh °C
1 September 202622.830.5
2 September 202622.428.4
3 September 202622.630.5
4 September 202622.730.5
5 September 202622.629.6
6 September 202622.629.5
7 September 202622.729.8
8 September 202622.129.3
9 September 202622.231.6
10 September 202621.631.5
11 September 202621.331.6
12 September 202621.931.7
13 September 202622.727.1
14 September 202622.229.8
15 September 20262231.2
16 September 202622.330.8
17 September 202622.431.2
18 September 202621.931.5
19 September 202622.731.7
20 September 202622.532.7
21 September 202622.534
22 September 202622.530.8
23 September 202622.731.1
24 September 202622.932
25 September 202622.330.8
26 September 202622.730.5
27 September 202622.532.3
28 September 202620.833.4
29 September 202621.533.2
30 September 202621.330.5
Baner station values. Daily highs and lows come from the daily cache.
Rain, day by day (September)
Grey line: 2.5 mm, the rainy-day threshold (IMD). 2 rainy days; 11 days with 0.3 mm or more.
Daily rainfall, September 2026Bar chart of rain per day in September 2026. 2 days reached 2.5 mm; the wettest day was 28 September 2026 with 18.2 mm.05101520mm per day1 September 2026: 0.4 mm2 September 2026: 2.4 mm3 September 2026: 0.2 mm (trace)5 September 2026: 2.4 mm6 September 2026: 1 mm7 September 2026: 0.6 mm8 September 2026: 0.8 mm13 September 2026: 1 mm15 September 2026: 0.8 mm22 September 2026: 17.4 mm (rainy day)23 September 2026: 0.6 mm28 September 2026: 18.2 mm (rainy day)2.5 mm rainy-day threshold18.2 mm18152229
Show the numbers
Rain, day by day (September)
DayRain mm
1 September 20260.4
2 September 20262.4
3 September 20260.2
4 September 20260
5 September 20262.4
6 September 20261
7 September 20260.6
8 September 20260.8
9 September 20260
10 September 20260
11 September 20260
12 September 20260
13 September 20261
14 September 20260
15 September 20260.8
16 September 20260
17 September 20260
18 September 20260
19 September 20260
20 September 20260
21 September 20260
22 September 202617.4
23 September 20260.6
24 September 20260
25 September 20260
26 September 20260
27 September 20260
28 September 202618.2
29 September 20260
30 September 20260
Days under 0.3 mm are traces and count as dry. Totals still include every drop.

Monsoon & rainfall history → · Temperature history →

Birds · BirdNET acoustic AI · confirmed = 0.70 or higher

Birds of September — Baner Hill

Confirmed detections
1,226
≥ 0.70 confidence
Confirmed species
42
≥ 0.70 confidence
Peak hour
8:00 AM
IST
Most active
Ashy Prinia
604 detections
When the hill sings: birds by hour
Confirmed detections per IST hour, whole month. Shaded: the dawn window, 05:00–07:59, with 37% of all confirmed detections.
Confirmed bird detections by hour of dayBar chart of confirmed detections in each IST hour over the month; peak at 08:00 with 275. 37% fell between 05:00 and 07:59.Dawn window 05:00–07:59 IST050100150200250300detections02:00–02:59 IST: 2 confirmed detections03:00–03:59 IST: 2 confirmed detections06:00–06:59 IST: 188 confirmed detections07:00–07:59 IST: 267 confirmed detections08:00–08:59 IST: 275 confirmed detections09:00–09:59 IST: 63 confirmed detections10:00–10:59 IST: 25 confirmed detections11:00–11:59 IST: 40 confirmed detections12:00–12:59 IST: 42 confirmed detections13:00–13:59 IST: 23 confirmed detections14:00–14:59 IST: 47 confirmed detections15:00–15:59 IST: 16 confirmed detections16:00–16:59 IST: 39 confirmed detections17:00–17:59 IST: 80 confirmed detections18:00–18:59 IST: 111 confirmed detections19:00–19:59 IST: 5 confirmed detections22:00–22:59 IST: 1 confirmed detectionspeak 08:00, 2750006121823
Show the numbers
When the hill sings: birds by hour
Hour (IST)Confirmed detections
00:000
01:000
02:002
03:002
04:000
05:000
06:00188
07:00267
08:00275
09:0063
10:0025
11:0040
12:0042
13:0023
14:0047
15:0016
16:0039
17:0080
18:00111
19:005
20:000
21:000
22:001
23:000
BirdNET hears calls, not birds: one bird singing often counts many times. Rain and wind lower confidence, so wet hours look quieter.
Bird detections and species by BirdNET confidence tier
ConfidenceDetectionsSpecies
≥ 0.70 · confirmed (headline)1,22642
≥ 0.503,10165
≥ 0.306,95588
All recorded (≥ 0.15) · candidates15,625124

BirdNET gives every detection a confidence score. Earth Pulse counts only detections at 0.70 or higher as confirmed; lower tiers are shown for transparency and include false positives.

Top 10 confirmed species this month

  1. #1
    Ashy Prinia
    ©Photo: Tisha Mukherjee, via Wikimedia Commons · CC BY-SA 4.0
    Ashy PriniaPrinia socialis604 (55%)
  2. #2
    Common Tailorbird
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    Common TailorbirdOrthotomus sutorius107 (10%)
  3. #3
    Gray Francolin
    ©Photo: Tisha Mukherjee, via Wikimedia Commons · CC BY-SA 4.0
    Gray FrancolinOrtygornis pondicerianus105 (10%)
  4. #4
    Red-wattled Lapwing
    ©Photo: Shantanu Kuveskar, via Wikimedia Commons · CC BY-SA 4.0
    Red-wattled LapwingVanellus indicus74 (7%)
  5. #5
    Jungle Prinia
    ©Photo: Tisha Mukherjee, via Wikimedia Commons · CC BY-SA 4.0
    Jungle PriniaPrinia sylvatica61 (6%)
  6. #6
    Common Myna
    ©Photo: Gerrie van Vuuren, via Wikimedia Commons · CC BY-SA 4.0
    Common MynaAcridotheres tristis43 (4%)
  7. #7
    Oriental Magpie-Robin
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    Oriental Magpie-RobinCopsychus saularis32 (3%)
  8. #8
    Alexandrine Parakeet
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    Alexandrine ParakeetPsittacula eupatria27 (2%)
  9. #9
    Rose-ringed Parakeet
    ©Photo: danielskatz, via Wikimedia Commons · CC BY 4.0
    Rose-ringed ParakeetPsittacula krameri22 (2%)
  10. #10
    Asian Koel
    ©Photo: Challiyan, via Wikimedia Commons · CC BY-SA 4.0
    Asian KoelEudynamys scolopaceus20 (2%)

View live bird detection log →

Birds · who rose, who fell

Species momentum vs August 2026

Confirmed detections (confidence 0.70 or higher), this month vs last month. Rule: up or down = change of 25% or more AND at least 5 detections; otherwise stable. Bars: last month (light) and this month (dark), per bird.

More active (2)

  • Gray Francolin
    ©Photo: Tisha Mukherjee, via Wikimedia Commons · CC BY-SA 4.0
    Gray FrancolinOrtygornis pondicerianus55 → 105 (+91%)
  • Alexandrine Parakeet
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    Alexandrine ParakeetPsittacula eupatria1 → 27 (+2,600%)

Less active (11)

  • Jungle Prinia
    ©Photo: Tisha Mukherjee, via Wikimedia Commons · CC BY-SA 4.0
    Jungle PriniaPrinia sylvatica804 → 61 (−92%)
  • Common Tailorbird
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    Common TailorbirdOrthotomus sutorius321 → 107 (−67%)
  • Red-wattled Lapwing
    ©Photo: Shantanu Kuveskar, via Wikimedia Commons · CC BY-SA 4.0
    Red-wattled LapwingVanellus indicus223 → 74 (−67%)
  • Asian Koel
    ©Photo: Challiyan, via Wikimedia Commons · CC BY-SA 4.0
    Asian KoelEudynamys scolopaceus91 → 20 (−78%)
  • Oriental Magpie-Robin
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    Oriental Magpie-RobinCopsychus saularis87 → 32 (−63%)
  • Red-vented Bulbul
    ©Photo: Mahmadanesh, via Wikimedia Commons · CC BY 4.0
    Red-vented BulbulPycnonotus cafer20 → 3 (−85%)
  • Rose-ringed Parakeet
    ©Photo: danielskatz, via Wikimedia Commons · CC BY 4.0
    Rose-ringed ParakeetPsittacula krameri37 → 22 (−41%)
  • Cinereous Tit
    ©Photo: Shantanu Kuveskar, via Wikimedia Commons · CC BY-SA 4.0
    Cinereous TitParus cinereus22 → 10 (−55%)
  • Gray-breasted Prinia
    ©Photo: Shantanu Kuveskar, via Wikimedia Commons · CC BY-SA 4.0
    Gray-breasted PriniaPrinia hodgsonii12 → 1 (−92%)
  • Indian White-eye
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    Indian White-eyeZosterops palpebrosus24 → 17 (−29%)
  • Green Sandpiper
    ©Photo: Swardeepak, via Wikimedia Commons · CC BY-SA 4.0
    Green SandpiperTringa ochropus6 → 1 (−83%)
Heard this month, not last month (9)Rock Pigeon, Tree Pipit, Ruddy Shelduck, Purple Sunbird …
  • Rock Pigeon
    ©Photo: william_stephens, via Wikimedia Commons · CC BY 4.0
    Rock PigeonColumba livia7 this month · not heard last month
  • Tree Pipit
    ©Photo: Imran Shah from Islamabad, Pakistan, via Wikimedia Commons · CC BY-SA 2.0
    Tree PipitAnthus trivialis4 this month · not heard last month
  • Ruddy Shelduck
    ©Photo: Original: Rohit Sharma , this edit: MPF, via Wikimedia Commons · CC BY-SA 4.0
    Ruddy ShelduckTadorna ferruginea2 this month · not heard last month
  • Purple Sunbird
    ©Photo: Nicholas Iyadurai, via Wikimedia Commons · CC BY-SA 4.0
    Purple SunbirdCinnyris asiaticus1 this month · not heard last month
  • Black Redstart
    ©Photo: El Golli Mohamed, via Wikimedia Commons · CC BY-SA 4.0
    Black RedstartPhoenicurus ochruros1 this month · not heard last month
  • Greenish Warbler
    ©Photo: Dibyendu Ash, via Wikimedia Commons · CC BY-SA 3.0
    Greenish WarblerPhylloscopus trochiloides1 this month · not heard last month
  • Little Swift
    ©Photo: Derek Keats, via Wikimedia Commons · CC BY 2.0
    Little SwiftApus affinis1 this month · not heard last month
  • Oriental Skylark
    ©Photo: Hari K Patibanda, via Wikimedia Commons · CC BY 2.0
    Oriental SkylarkAlauda gulgula1 this month · not heard last month
  • White-throated Kingfisher
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    White-throated KingfisherHalcyon smyrnensis1 this month · not heard last month
Heard last month, not this month (13)Tickell's Blue Flycatcher, Eurasian Coot, House Crow, Eurasian Curlew …
  • Tickell's Blue Flycatcher
    ©Photo: Shantanu Kuveskar, via Wikimedia Commons · CC BY-SA 4.0
    Tickell's Blue FlycatcherCyornis tickelliae11 last month · none this month
  • Eurasian Coot
    ©Photo: Alexis Lours, via Wikimedia Commons · CC BY 4.0
    Eurasian CootFulica atra3 last month · none this month
  • House Crow
    ©Photo: Pkspks, via Wikimedia Commons · CC BY 4.0
    House CrowCorvus splendens3 last month · none this month
  • Eurasian Curlew
    ©Photo: Andreas Trepte, via Wikimedia Commons · CC BY-SA 2.5
    Eurasian CurlewNumenius arquata3 last month · none this month
  • Gray Wagtail
    ©Photo: Herwig Winter, via Wikimedia Commons · CC BY-SA 4.0
    Gray WagtailMotacilla cinerea1 last month · none this month
  • White Wagtail
    ©Photo: Jac. Janssen from BAARLO LB, NL, via Wikimedia Commons · CC BY 2.0
    White WagtailMotacilla alba1 last month · none this month
  • Crested Serpent-Eagle
    ©Photo: Yathin S Krishnappa, via Wikimedia Commons · CC BY-SA 3.0
    Crested Serpent-EagleSpilornis cheela1 last month · none this month
  • Shikra
    ©Photo: Ravi Vaidyanathan, via Wikimedia Commons · CC BY 2.5
    ShikraAccipiter badius1 last month · none this month
  • Paddyfield Pipit
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    Paddyfield PipitAnthus rufulus1 last month · none this month
  • Eurasian Collared-Dove
    ©Photo: stevem4560, via Wikimedia Commons · CC BY 4.0
    Eurasian Collared-DoveStreptopelia decaocto1 last month · none this month
  • Savanna Nightjar
    ©Photo: JJ Harrison, via Wikimedia Commons · CC BY-SA 3.0
    Savanna NightjarCaprimulgus affinis1 last month · none this month
  • Small Minivet
    ©Photo: Rushen, via Wikimedia Commons · CC BY-SA 2.0
    Small MinivetPericrocotus cinnamomeus1 last month · none this month
  • Barn Swallow
    ©Photo: Andreas Trepte, via Wikimedia Commons · CC BY-SA 2.5
    Barn SwallowHirundo rustica1 last month · none this month
Stable (20)Ashy Prinia, Common Myna, Large-billed Crow, Black-crowned Night-Heron …
  • Ashy Prinia
    ©Photo: Tisha Mukherjee, via Wikimedia Commons · CC BY-SA 4.0
    Ashy PriniaPrinia socialis657 → 604 (−8%)
  • Common Myna
    ©Photo: Gerrie van Vuuren, via Wikimedia Commons · CC BY-SA 4.0
    Common MynaAcridotheres tristis36 → 43 (+19%)
  • Large-billed Crow
    ©Photo: Laitche, via Wikimedia Commons · CC BY-SA 4.0
    Large-billed CrowCorvus macrorhynchos13 → 14 (+8%)
  • Black-crowned Night-Heron
    ©Photo: ramidos, via Wikimedia Commons · CC BY 4.0
    Black-crowned Night-HeronNycticorax nycticorax6 → 9 (+50%)
  • Common Sandpiper
    ©Photo: JJ Harrison ( https://www.jjharrison.com.au/ ), via Wikimedia Commons · CC BY 3.0
    Common SandpiperActitis hypoleucos8 → 9 (+13%)
  • Osprey
    ©Photo: Chuck Homler / Focus On Wildlife, via Wikimedia Commons · CC BY-SA 4.0
    OspreyPandion haliaetus5 → 9 (+80%)
  • Greater Coucal
    ©Photo: Davidvraju, via Wikimedia Commons · CC BY-SA 4.0
    Greater CoucalCentropus sinensis7 → 7 (±0%)
  • Common Kingfisher
    ©Photo: Tony Wood, via Wikimedia Commons · CC BY 2.0
    Common KingfisherAlcedo atthis3 → 5 (+67%)
  • Common Hawk-Cuckoo
    ©Photo: Unknown author, via Wikimedia Commons · CC BY 2.0
    Common Hawk-CuckooHierococcyx varius7 → 4 (−43%)
  • Rufous Treepie
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    Rufous TreepieDendrocitta vagabunda1 → 4 (+300%)
  • Indian Robin
    ©Photo: Shino jacob koottanad, via Wikimedia Commons · CC BY-SA 4.0
    Indian RobinCopsychus fulicatus7 → 3 (−57%)
  • Eurasian Moorhen
    ©Photo: Alexis Lours, via Wikimedia Commons · CC BY 4.0
    Eurasian MoorhenGallinula chloropus5 → 3 (−40%)
  • Eurasian Kestrel
    ©Photo: Andreas Trepte, via Wikimedia Commons · CC BY-SA 2.5
    Eurasian KestrelFalco tinnunculus1 → 3 (+200%)
  • Indian Scops-Owl
    ©Photo: Shantanu Kuveskar, via Wikimedia Commons · CC BY-SA 4.0
    Indian Scops-OwlOtus bakkamoena1 → 3 (+200%)
  • Scaly-breasted Munia
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    Scaly-breasted MuniaLonchura punctulata2 → 2 (±0%)
  • Red-naped Ibis
    ©Photo: Shantanu Kuveskar, via Wikimedia Commons · CC BY-SA 4.0
    Red-naped IbisPseudibis papillosa2 → 1 (−50%)
  • Gray Heron
    ©Photo: Giacomo Cimino ( foto.giacomocimino.workers.dev · @giacomociminoph ), via Wikimedia Commons · CC BY-SA 4.0
    Gray HeronArdea cinerea3 → 1 (−67%)
  • Spotted Owlet
    ©Photo: This Photo was taken by Timothy A. Gonsalves . Feel free to use my photos, but please mention me as the author. I would…, via Wikimedia Commons · CC BY-SA 4.0
    Spotted OwletAthene brama5 → 1 (−80%)
  • Indian Gray Hornbill
    ©Photo: J.M.Garg, via Wikimedia Commons · CC BY-SA 3.0
    Indian Gray HornbillOcyceros birostris2 → 1 (−50%)
  • Indian Peafowl
    ©Photo: Kandukuru Nagarjun from Bangalore, India, via Wikimedia Commons · CC BY 2.0
    Indian PeafowlPavo cristatus1 → 1 (±0%)

"Not heard" means no confirmed detection (0.70 or higher) on the recorder, not that the bird left the hill. Rare birds with 1–2 detections move in and out of these lists by chance.

Soundscape · NDSI

Soundscape health

NDSI 0 to 1; higher = more natural sound relative to human noise. Readings outside 0-1 are excluded as invalid.

Mean NDSI this month
0.493
median 0.536; middle 80% 0.138–0.769
= similar (+0.002)
Mean NDSI, August 2026
0.491
median 0.543; 876 valid readings
Valid readings
908
of 1,419 raw on 30 days; 511 outside 0–1 excluded
Soundscape index, day by day (September)
Daily mean NDSI from valid readings (0 to 1). Grey line: August 2026 mean, 0.491.
Daily mean NDSI, SeptemberLine chart of the daily mean soundscape index (NDSI) for each day of September, between 0.382 and 0.594; monthly mean 0.493. Last month's mean was 0.491.0.350.40.450.50.550.6NDSI (0–1)Last month mean 0.4911 September 2026: mean NDSI 0.542 from 30 readings2 September 2026: mean NDSI 0.472 from 32 readings3 September 2026: mean NDSI 0.509 from 28 readings4 September 2026: mean NDSI 0.438 from 34 readings5 September 2026: mean NDSI 0.431 from 26 readings6 September 2026: mean NDSI 0.382 from 30 readings7 September 2026: mean NDSI 0.453 from 41 readings8 September 2026: mean NDSI 0.404 from 39 readings9 September 2026: mean NDSI 0.528 from 27 readings10 September 2026: mean NDSI 0.571 from 28 readings11 September 2026: mean NDSI 0.456 from 24 readings12 September 2026: mean NDSI 0.534 from 28 readings13 September 2026: mean NDSI 0.396 from 24 readings14 September 2026: mean NDSI 0.515 from 34 readings15 September 2026: mean NDSI 0.529 from 33 readings16 September 2026: mean NDSI 0.561 from 43 readings17 September 2026: mean NDSI 0.449 from 40 readings18 September 2026: mean NDSI 0.516 from 42 readings19 September 2026: mean NDSI 0.535 from 28 readings20 September 2026: mean NDSI 0.416 from 26 readings21 September 2026: mean NDSI 0.488 from 23 readings22 September 2026: mean NDSI 0.488 from 29 readings23 September 2026: mean NDSI 0.556 from 24 readings24 September 2026: mean NDSI 0.549 from 30 readings25 September 2026: mean NDSI 0.553 from 30 readings26 September 2026: mean NDSI 0.478 from 30 readings27 September 2026: mean NDSI 0.488 from 24 readings28 September 2026: mean NDSI 0.455 from 34 readings29 September 2026: mean NDSI 0.533 from 24 readings30 September 2026: mean NDSI 0.594 from 23 readings18152229
Show the numbers
Soundscape index, day by day (September)
DayMean NDSIReadings
1 September 20260.54230
2 September 20260.47232
3 September 20260.50928
4 September 20260.43834
5 September 20260.43126
6 September 20260.38230
7 September 20260.45341
8 September 20260.40439
9 September 20260.52827
10 September 20260.57128
11 September 20260.45624
12 September 20260.53428
13 September 20260.39624
14 September 20260.51534
15 September 20260.52933
16 September 20260.56143
17 September 20260.44940
18 September 20260.51642
19 September 20260.53528
20 September 20260.41626
21 September 20260.48823
22 September 20260.48829
23 September 20260.55624
24 September 20260.54930
25 September 20260.55330
26 September 20260.47830
27 September 20260.48824
28 September 20260.45534
29 September 20260.53324
30 September 20260.59423
Higher NDSI = more natural sound (birds, insects) relative to human noise. Day-to-day changes are noisy; look at the month, not single days.

One recording node. 36% of raw readings were outside 0-1 and excluded.

The long view · one value per year

Every September since 1980

Two separate records, drawn on separate charts with separate axes: ERA5 reanalysis for 1980–2021, then Earth Pulse's own record for the last few years. They are never joined into one line.

1980–2021: ERA5 reanalysis

ERA5: September mean temperature, 1980–2021
Reanalysis model (Copernicus / ECMWF), one value per year, its own axis. Grey line: 1981–2010 normal, 23.3 °C.
September mean temperature, ERA5 reanalysis, 1980–2021Line chart of the September mean temperature for each year from 1980 to 2021 on ERA5. Values range from 22.5 °C in 1993 to 24.4 °C in 1987. The 1981–2010 normal is 23.3 °C.2222.52323.52424.525°C (mean)1981–2010 normal 23.27 °C1987 warmest, 24.41993 coolest, 22.51980: 23.31 °C mean (ERA5)1981: 23.47 °C mean (ERA5)1982: 23.27 °C mean (ERA5)1983: 23.2 °C mean (ERA5)1984: 23.03 °C mean (ERA5)1985: 23.4 °C mean (ERA5)1986: 23.69 °C mean (ERA5)1987: 24.41 °C mean (ERA5)1988: 23.5 °C mean (ERA5)1989: 23.19 °C mean (ERA5)1990: 22.71 °C mean (ERA5)1991: 23.36 °C mean (ERA5)1992: 23.39 °C mean (ERA5)1993: 22.51 °C mean (ERA5)1994: 22.63 °C mean (ERA5)1995: 23.22 °C mean (ERA5)1996: 23.11 °C mean (ERA5)1997: 23.28 °C mean (ERA5)1998: 23.46 °C mean (ERA5)1999: 22.76 °C mean (ERA5)2000: 23.68 °C mean (ERA5)2001: 23.56 °C mean (ERA5)2002: 23.05 °C mean (ERA5)2003: 22.8 °C mean (ERA5)2004: 23.22 °C mean (ERA5)2005: 23.05 °C mean (ERA5)2006: 23.58 °C mean (ERA5)2007: 23.44 °C mean (ERA5)2008: 22.95 °C mean (ERA5)2009: 23.84 °C mean (ERA5)2010: 23.46 °C mean (ERA5)2011: 22.83 °C mean (ERA5)2012: 23.29 °C mean (ERA5)2013: 23.03 °C mean (ERA5)2014: 23.49 °C mean (ERA5)2015: 23.94 °C mean (ERA5)2016: 22.77 °C mean (ERA5)2017: 24.05 °C mean (ERA5)2018: 23.23 °C mean (ERA5)2019: 23.54 °C mean (ERA5)2020: 23.96 °C mean (ERA5)2021: 23.38 °C mean (ERA5)19801990200020102020
Show the numbers
ERA5: September mean temperature, 1980–2021
YearMean °CMax °C (avg)Min °C (avg)
198023.3127.220.83
198123.4727.4121.02
198223.2727.2120.86
198323.226.3721.62
198423.0326.9520.5
198523.427.720.67
198623.6928.0420.94
198724.4128.6121.67
198823.526.8321.71
198923.1926.9720.94
199022.7126.0520.73
199123.3627.4620.77
199223.3927.3620.6
199322.5125.4420.95
199422.6326.1420.08
199523.2226.7321.04
199623.1126.7121.02
199723.2827.1720.79
199823.4626.6121.54
199922.7626.1220.81
200023.6827.8420.92
200123.5627.7920.85
200223.0526.8520.52
200322.825.920.91
200423.2227.0120.74
200523.0526.2321.32
200623.5827.3521.35
200723.4426.6121.51
200822.9526.5520.74
200923.8427.4421.76
201023.4626.8421.37
201122.8326.2120.7
201223.2926.7521.04
201323.0326.3621.07
201423.4927.0121.02
201523.9428.1521.18
201622.7725.6221.02
201724.0527.9421.54
201823.2327.3820.28
201923.5426.5921.59
202023.9627.9521.44
202123.3826.2221.53
ERA5 is a ~30 km grid model, so it reads cooler than a point near the city. Compare these years only with each other.
ERA5: September rainfall, 1980–2021
Wettest 2016 (425 mm), driest 1997 (57 mm). Grey line: 1981–2010 normal, 166 mm.
September rainfall, ERA5 reanalysis, 1980–2021Bar chart of September rain totals per year on ERA5, from 57 mm in 1997 to 425 mm in 2016. The 1981–2010 normal is 166 mm.0100200300400500mm (month total)1980: 91.9 mm, 15 rainy days (ERA5)1981: 189.8 mm, 17 rainy days (ERA5)1982: 97.6 mm, 9 rainy days (ERA5)1983: 241.2 mm, 21 rainy days (ERA5)1984: 156.5 mm, 12 rainy days (ERA5)1985: 68.8 mm, 8 rainy days (ERA5)1986: 103.3 mm, 10 rainy days (ERA5)1987: 69.2 mm, 7 rainy days (ERA5)1988: 344.8 mm, 28 rainy days (ERA5)1989: 179.2 mm, 17 rainy days (ERA5)1990: 71.6 mm, 12 rainy days (ERA5)1991: 87.1 mm, 10 rainy days (ERA5)1992: 109.7 mm, 10 rainy days (ERA5)1993: 324 mm, 16 rainy days (ERA5)1994: 97.6 mm, 11 rainy days (ERA5)1995: 303.7 mm, 13 rainy days (ERA5)1996: 137.2 mm, 17 rainy days (ERA5)1997: 57 mm, 7 rainy days (ERA5)1998: 192.6 mm, 16 rainy days (ERA5)1999: 185.2 mm, 18 rainy days (ERA5)2000: 101.3 mm, 12 rainy days (ERA5)2001: 185.3 mm, 13 rainy days (ERA5)2002: 84.9 mm, 7 rainy days (ERA5)2003: 113.2 mm, 16 rainy days (ERA5)2004: 190.1 mm, 16 rainy days (ERA5)2005: 331.7 mm, 24 rainy days (ERA5)2006: 181.2 mm, 17 rainy days (ERA5)2007: 123 mm, 16 rainy days (ERA5)2008: 279 mm, 17 rainy days (ERA5)2009: 199.5 mm, 17 rainy days (ERA5)2010: 179.6 mm, 19 rainy days (ERA5)2011: 141.9 mm, 11 rainy days (ERA5)2012: 126.4 mm, 14 rainy days (ERA5)2013: 213.7 mm, 17 rainy days (ERA5)2014: 118.5 mm, 13 rainy days (ERA5)2015: 105 mm, 11 rainy days (ERA5)2016: 424.5 mm, 15 rainy days (ERA5)2017: 316 mm, 18 rainy days (ERA5)2018: 79.6 mm, 10 rainy days (ERA5)2019: 377.4 mm, 24 rainy days (ERA5)2020: 252.2 mm, 22 rainy days (ERA5)2021: 141.7 mm, 18 rainy days (ERA5)1981–2010 normal 166.2 mm19801990200020102020
Show the numbers
ERA5: September rainfall, 1980–2021
YearRain mmRainy days
198091.915
1981189.817
198297.69
1983241.221
1984156.512
198568.88
1986103.310
198769.27
1988344.828
1989179.217
199071.612
199187.110
1992109.710
199332416
199497.611
1995303.713
1996137.217
1997577
1998192.616
1999185.218
2000101.312
2001185.313
200284.97
2003113.216
2004190.116
2005331.724
2006181.217
200712316
200827917
2009199.517
2010179.619
2011141.911
2012126.414
2013213.717
2014118.513
201510511
2016424.515
201731618
201879.610
2019377.424
2020252.222
2021141.718
Rainy day on ERA5 = 2.5 mm or more in the IST day, the same rule as the station.

Recent years: Earth Pulse record

Open-Meteo model before 10 Oct 2025, Baner Weather Union station from 10 Oct 2025 (see the source on each row)

Earth Pulse record: September temperature
Dot = monthly average; line = lowest to highest reading.
Open-Meteo model estimateBaner Weather Union station
September temperature, Earth Pulse record 2022–2026For each September from 2022 to 2026, a vertical line from the lowest to the highest temperature with a dot at the monthly average. 2022 average 23.3 °C (Open-Meteo model); 2023 average 24.1 °C (Open-Meteo model); 2024 average 23.6 °C (Open-Meteo model); 2025 average 23.2 °C (Open-Meteo model); 2026 average 26.1 °C (Baner station).1520253035°C2022 (Open-Meteo model): average 23.3 °C, lowest 19.1 °C, highest 30 °C2022 (Open-Meteo model): average 23.3 °C, lowest 19.1 °C, highest 30 °C23.320222023 (Open-Meteo model): average 24.1 °C, lowest 20.2 °C, highest 31.2 °C2023 (Open-Meteo model): average 24.1 °C, lowest 20.2 °C, highest 31.2 °C24.120232024 (Open-Meteo model): average 23.6 °C, lowest 19 °C, highest 30.4 °C2024 (Open-Meteo model): average 23.6 °C, lowest 19 °C, highest 30.4 °C23.620242025 (Open-Meteo model): average 23.2 °C, lowest 18.7 °C, highest 28.8 °C2025 (Open-Meteo model): average 23.2 °C, lowest 18.7 °C, highest 28.8 °C23.220252026 (Baner station): average 26.1 °C, lowest 20.8 °C, highest 34 °C2026 (Baner station): average 26.1 °C, lowest 20.8 °C, highest 34 °C26.12026
Show the numbers
Earth Pulse record: September temperature
YearSourceAverage °CLowest °CHighest °C
2022Open-Meteo model23.319.130
2023Open-Meteo model24.120.231.2
2024Open-Meteo model23.61930.4
2025Open-Meteo model23.218.728.8
2026Baner station26.120.834
Colour shows the source. Open-Meteo is a model estimate (before 10 Oct 2025); the station is a measurement at Baner. A change between the two colours is a change of instrument, not a trend.
Earth Pulse record: September rainfall
Month total in mm; colour shows the source.
Open-Meteo model estimateBaner Weather Union station
September rainfall, Earth Pulse record 2022–2026Bar chart of September rain totals: 2022 206.1 mm (Open-Meteo model); 2023 264.7 mm (Open-Meteo model); 2024 245.9 mm (Open-Meteo model); 2025 259.5 mm (Open-Meteo model); 2026 45.8 mm (Baner station).050100150200250300mm (month total)2022 (Open-Meteo model): 206.1 mm, 19 rainy days20620222023 (Open-Meteo model): 264.7 mm, 18 rainy days26520232024 (Open-Meteo model): 245.9 mm, 16 rainy days24620242025 (Open-Meteo model): 259.5 mm, 19 rainy days26020252026 (Baner station): 45.8 mm, 2 rainy days462026
Show the numbers
Earth Pulse record: September rainfall
YearSourceRain mmRainy days
2022Open-Meteo model206.119
2023Open-Meteo model264.718
2024Open-Meteo model245.916
2025Open-Meteo model259.519
2026Baner station45.82
Rain totals add up all rain; a rainy day is 2.5 mm or more in the IST day.

Air quality, same month, last 5 years

EU AQI, lower = cleaner by year
YearAvg AQIRangeClean days (≤ 40)High days (≥ 61)Complete days
2026 ★33.510–9614830
202527.612–6925430
202426.28–6421330
202327.38–6520430
202234.810–6917830

EU AQI, lower = cleaner. Daily cache (ep_daily_climate). aqi_avg is the average of daily means. Clean day = the day's worst hour stayed at EU AQI 40 or below; high-pollution day = the worst hour reached 61 or more. Bar: share of clean days (green) and high-pollution days (red).

Records

Records and ranks

Days that stood out in September 2026

  • Hottest day: 21 September 2026, 34 °C
  • Coolest night: 28 September 2026, 20.8 °C
  • Rainiest day: 28 September 2026, 18.2 mm
  • Cleanest air: 2 September 2026, daily-average EU AQI 12.8
  • Haziest air: 30 September 2026, daily-average EU AQI 68.3

How this September ranks

  • Average AQI: the 2nd highest (haziest) of 5 Septembers held by Earth Pulse.

Temperature and rain are not ranked: earlier years come from a different source (Open-Meteo model vs station).

Same calendar month across the sensor years held (up to the last 4 years plus this one). Rank 1 = lowest value. ERA5 is never ranked together with these.

On ERA5 (a separate record, 1980–2021) the warmest September was 1987 and the wettest 2016. ERA5 is never ranked together with Earth Pulse values.

Looking ahead · not a forecast

What a typical October looks like

Mean temperature
24.2 °C
average daily max 29.4 °C, min 20 °C
Rain
64 mm
on about 6 rainy days (2.5 mm or more)

ERA5 reanalysis normal 1981-2010 for the coming month. A long-term average, not a forecast. ERA5 runs cooler than a station near the city, so read these as the shape of the season rather than a number to expect on the Baner gauge.

Questions people ask

September 2026 in Baner: frequently asked questions

What was the air quality in Baner, Pune in September 2026?

The average EU AQI in Baner in September 2026 was 33.5 (range 10–96; lower is cleaner), hazier than August 2026 (16.4). 14 of 30 complete days were clean-air days, meaning the worst hour stayed at EU AQI 40 or below, and 8 were high-pollution days (worst hour 61 or more). Counting daily averages instead, 63% of days averaged EU AQI 40 or below.

How much rain fell in Baner in September 2026?

Baner received 45.8 mm of rain in September 2026 (Baner Weather Union station), drier than August 2026 (82 mm). 2 days were rainy days under the IMD rule of 2.5 mm or more in an IST day; 11 days had at least 0.3 mm. The wettest day was 28 September 2026 with 18.2 mm.

How hot was Baner in September 2026?

Temperatures in Baner ranged from 20.8 °C to 34 °C in September 2026, with a monthly average of 26.1 °C (Baner Weather Union station). That was warmer than August 2026 (24.8 °C); the hottest day was 21 September 2026 at 34 °C. September 2025 averaged 23.2 °C, but that value is an Open-Meteo model estimate, so the year-on-year gap is not a trend.

Which birds were heard on Baner Hill in September 2026?

BirdNET confirmed 42 bird species from 1,226 detections at confidence 0.70 or higher on Baner Hill in September 2026. The most active confirmed species was the Ashy Prinia (604 detections), and birds called most at 08:00 IST. Counting every recorded detection, including lower-confidence candidates, there were 124 candidate species in 15,625 detections.

How natural did Baner Hill sound in September 2026?

The mean soundscape index (NDSI, 0 to 1; higher means more natural sound relative to human noise) was 0.493 in September 2026, with a median of 0.536 from 908 valid readings. That is similar to August 2026 (mean 0.491).

How does September 2026 compare with the long-term climate in Baner?

On ERA5 reanalysis (Copernicus / ECMWF), the 1981–2010 normal for September in the Baner grid cell is 23.3 °C with 166.2 mm of rain. Compared with itself, ERA5 changed by +0.08 °C between 1981–90 and 2012–21. ERA5 is a 30 km model grid, so it is shown beside this month's readings (26.1 °C, 45.8 mm), not subtracted from them.

Week by week

Weekly reports for September 2026

Week of 31 Aug – 6 SepWeek of 7 Sep – 13 SepWeek of 14 Sep – 20 SepWeek of 21 Sep – 27 SepWeek of 28 Sep – 4 Oct

Methods & definitions

How this report was made

Definitions

  • Rainy day: 2.5 mm or more of rain in the IST calendar day (India Meteorological Department). Less than 0.3 mm is a trace and counts as dry. The month's rain total still adds up every drop.
  • Clean-air day: the day's worst hour stayed at European AQI 40 or below. High-pollution day: the worst hour reached EU AQI 61 or more. Only days with at least 18 hourly readings count.
  • Confirmed bird: a BirdNET detection with confidence 0.70 or higher. Tiers (0.70, 0.50, 0.30, 0.15) are nested: each includes the higher ones.
  • Species momentum: "more" or "less active" needs a change of at least 25% and at least 5 detections; otherwise "stable".
  • Soundscape (NDSI): readings outside 0–1 are calibration errors and are dropped; a change in the monthly mean smaller than 0.02 is "similar".
  • Model vs station: temperature and rain before 10 Oct 2025 are Open-Meteo model estimates; from then on they are Baner Weather Union station readings. ERA5 is a third, separate record.

Sources

  • Air quality, temperature, humidity and rain: Earth Pulse daily cache (ep_daily_climate). Temperature and rain are Open-Meteo model estimates before 10 Oct 2025 and Baner Weather Union station readings from then.
  • Birds: BirdNET acoustic AI on the Baner Hill node. Monitoring began in March 2026; earlier months have no bird data. Headline numbers count detections at confidence 0.70 or higher; lower tiers are nested.
  • Soundscape: NDSI readings from the Baner Hill node, keeping 0 to 1 only.
  • Long-term context: ERA5 reanalysis (Copernicus / ECMWF), 1980-2021, 42 years. A model, not a station; compared only with itself.

Notes

  • The share of clean days uses the daily-average AQI (EU scale). Older posts counted the share of hours.
  • Hottest, coolest and rainiest days come from the daily cache and can differ by rounding from hourly readings.
  • Pulse Score = 0.4 x (100 - average AQI) + 0.3 x min(100, confirmed detections / 8) + 0.3 x share of clean days.

ERA5: contains modified Copernicus Climate Change Service information (1980-2021). Neither the European Commission nor ECMWF is responsible for any use of it.

Time zone: Asia/Kolkata (IST); a month runs from 00:00 IST on the 1st to 00:00 IST on the 1st of the next month. Figures computed by the Earth Pulse Worker (data 2026.10.06-r3-monthly-seo); the written story is generated by AI from those figures only.

Reuse

Cite this page

Earth Pulse (2026). September 2026 in Baner — Air, Birds & Weather. Earth Pulse monthly report, Baner, Pune, India. Published 6 October 2026. https://www.earth-pulse.org/blog/2026/september.html

Data are citizen-science observations from one site; please cite the page and state the source labels (station, Open-Meteo model, ERA5) when you reuse a number.

Licence: Earth Pulse's own observations on this page are shared under CC BY-NC 4.0 (credit Earth Pulse; no commercial use without permission). ERA5 values contain modified Copernicus Climate Change Service information; Open-Meteo and Weather Union data keep their own terms.

The environmental readings for September 2026 offer a mixed picture of air quality, temperature, and rainfall.
💨 Air quality history 🌡️ Temperature history 🌦️ Monsoon & rain 🐦 All birds 🏔️ Baner Hill 📈 Climate since 1980 📅 All reports

🌿 Get monthly reports in your inbox

One email on the 1st of every month. Baner's environmental story, delivered.

No spam. Unsubscribe anytime.