Earth Pulse Monthly · April 2026 · Baner, Pune

April 2026 in Baner — Air, Birds & Weather

Generated from 14,581+ sensor readings · Published

Baner Hill, First of April 2026 (1 Apr 2026, 07:28 IST)
📷 First photo · 1 Apr 2026, 07:28 IST
Baner Hill, Last of April 2026 (28 Apr 2026, 17:54 IST)
📷 Last photo · 28 Apr 2026, 17:54 IST

In , Baner (Pune) recorded an average EU AQI of 65.6 (cleaner than March 2026); temperatures from 19.6 to 41.5 °C; 37.8 mm of rain with 1 rainy day (2.5 mm or more) and 29 confirmed bird species from 1,458 BirdNET detections (confidence 0.70 or higher).

April 2026 at a glance (screenshot and share)

🌿 Earth Pulse · Baner, PuneAPRIL 2026
April 2026: a moderate month for Baner
65.6Avg AQI (EU)
30.7°CAvg temperature
37.8 mmRain · 1 rainy days
29Confirmed species
1,458Confirmed detections
0 / 30Clean-air days (EU AQI)
Observing the Earth, over time · www.earth-pulse.org⚡ Pulse Score 45
📲 WhatsApp ✕ Share in LinkedIn

The month in numbers

Key facts: April 2026 in Baner, Pune

Average AQI (EU scale)
65.6average of daily means; range 31-87; lower is cleaner
Clean days (worst AQI 40 or below)
0of 30 complete days
High-pollution days (worst AQI 61 or above)
29of 30 complete days
Temperature range
19.6-41.5 °Caverage 30.7 °C (Baner Weather Union station readings)
Rain
37.8 mm1 rainy days (2.5 mm or more); 3 days with 0.3 mm or more
Average humidity
48%average of daily means
Confirmed bird species (0.70 or higher)
291458 confirmed detections
Candidate bird species (all detections)
9510981 detections including lower-confidence
Peak bird hour (confirmed)
08:00 IST
Most active confirmed species
Asian Koel835 detections
Soundscape (mean NDSI, 0-1)
0.378median 0.359; 129 valid readings
Pulse Score
45composite 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 45 out of 100A ring filled to 45 percent.45

Moderate month for Baner

April 2026 saw a notable improvement in air quality compared to last year, with the average AQI being cleaner by 1 point. Temperatures were warmer across the board, with an average increase of 1.4°C compared to April 2025.

Air13.8 / 40100 − average AQI 65.6
Birds30 / 30capped: 1,458 confirmed detections ÷ 8 is over 100
Days avg ≤ 400.9 / 303% of days had a daily-average EU AQI of 40 or below (not the clean-air-day count)

This April at Earth Pulse in Baner brought a cleaner air quality average of 65.6 compared to March's 68.1. The air was hazier than in April 2025, with an AQI average of 65.6 versus 66.6. However, the average temperature was warmer, reaching 30.7°C, a rise of 1.4°C from April 2025. Rainfall was significantly higher, with 37.8mm recorded on 1 rainy day, a substantial increase from the 8mm over 1 rainy day in April 2025. Birdsong was much more active, with 29 confirmed species detected, a significant rise from 5 species in March. This April also saw more confirmed detections, 1458, compared to 6 in March. The Pulse Score increased from 13 to 45. Temperature and rain for 2025 are Open-Meteo model estimates, while 2026 uses the Baner station, so these comparisons are not a trend.

Month on month

Compared with March 2026

April 2026 against March 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)
65.6
vs 68.1 in March 2026 · higher = hazier
cleaner by 2.5
Clean-air days (worst hour EU AQI ≤ 40)
0
vs 0 in March 2026
unchanged
Temperature range
19.6–41.5 °C
vs 18.6–39.9 °C in March 2026; average 30.7 vs 29.2 °C
warmer by 1.5 °C
Rainfall
37.8 mm
vs 32 mm in March 2026; rainy days 1 vs 1
wetter by 5.8 mm
Bird activity (confirmed)
1,458
detections vs 6 in March 2026
more active by 1,452
Confirmed species
29
vs 5 in March 2026
more by 24
Pulse Score
45
vs 13 in March 2026
higher by 32

Year on year · same month

Same month last year: April 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)
65.6
vs 66.6 in April 2025 · higher = hazier
cleaner by 1
Average temperature
30.7 °C
vs 29.3 °C in April 2025
warmer by 1.4 °C
Rainfall
37.8 mm
vs 8 mm in April 2025
wetter by 29.8 mm
Rainy days (≥ 2.5 mm)
1
vs 1 in April 2025
unchanged
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: April 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)
28.1 °C
mean; average daily max 36.4 °C, min 20.9 °C
Rain 8.6 mm on about 1 rainy days
ERA5 against itself: 1981–90 → 2012–21
+0.39 °C
mean 27.89 → 28.28 °C (decade averages)
Rain 6.1 → 6.5 mm (+0.4 mm)
ERA5 record years for April
  • Warmest: 2009 (29.58 °C mean)
  • Coolest: 1997 (26.4 °C mean)
  • Wettest: 1991 (28.3 mm)
  • Driest: 1990 (0 mm)
This month, separate series · Baner station
April 2026: average 30.7 °C, rain 37.8 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 April since 1980 →

Air · European AQI, 0–100

Air quality — April 2026

AQI range this month (EU scale, 0–100)
Low: 31High: 87
Avg AQI
65.6
EU scale
Days averaging ≤ 40
3%
daily-average AQI; feeds the Pulse Score
Humidity avg
48%
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 April 2026
MonTueWedThuFriSatSun
166 high-pollution day269 high-pollution day373 high-pollution day467 high-pollution day562 high-pollution day
659 high-pollution day757 high-pollution day864 high-pollution day970 high-pollution day1082 high-pollution day1174 high-pollution day1276 high-pollution day
1369 high-pollution day1466 high-pollution day1561 high-pollution day1657 high-pollution day1765 high-pollution day1869 high-pollution day1968 high-pollution day
2072 high-pollution day2172 high-pollution day2271 high-pollution day2373 high-pollution day2472 high-pollution day2571 high-pollution day2666 high-pollution day
2754 high-pollution day2858 high-pollution day2951 high-pollution day3037
Good (0–20)Fair (21–40)Moderate (41–60)Poor (61–80)Very poor (81–100)
Hover or tap a day for its worst hour. Lower is cleaner.

View full AQI history →

Weather · Baner station

Temperature & rain — Baner, Pune

High
41.5°
°C this month
Low
19.6°
°C this month
Average
30.7°
°C
Total rain
37.8
mm · 1 rainy days (≥ 2.5 mm)
Every day's low and high, April
Each bar runs from the coolest to the warmest reading of the IST day.
Daily temperature range, April 2026For each day of April 2026, a bar from the lowest to the highest temperature. Highest 41.5 °C on 19 April 2026; lowest 19.6 °C on 2 April 2026.15202530354045°C1 April 2026: 24–36.1 °C2 April 2026: 19.6–34.5 °C3 April 2026: 20.8–33.9 °C4 April 2026: 21.3–34.3 °C5 April 2026: 22.1–33.4 °C6 April 2026: 20.3–33.2 °C7 April 2026: 21–35.6 °C8 April 2026: 22.6–34.8 °C9 April 2026: 22.9–34.1 °C10 April 2026: 22.6–37 °C11 April 2026: 24.9–40.6 °C12 April 2026: 25.2–40.2 °C13 April 2026: 26–39.3 °C14 April 2026: 24.8–40.7 °C15 April 2026: 26.2–39.7 °C16 April 2026: 24.5–39.3 °C17 April 2026: 24.2–40.5 °C18 April 2026: 26.3–38.8 °C19 April 2026: 27.3–41.5 °C20 April 2026: 25.8–39 °C21 April 2026: 27.1–40.8 °C22 April 2026: 27.7–39.7 °C23 April 2026: 26.6–40.9 °C24 April 2026: 28.4–40.8 °C25 April 2026: 28.6–40.2 °C26 April 2026: 28.4–41.5 °C27 April 2026: 25.8–40.1 °C28 April 2026: 26.2–40 °C29 April 2026: 25.5–39.9 °C30 April 2026: 25.8–37.1 °Chigh 41.5 °Clow 19.6 °C18152229
Show the numbers
Every day's low and high, April
DayLow °CHigh °C
1 April 20262436.1
2 April 202619.634.5
3 April 202620.833.9
4 April 202621.334.3
5 April 202622.133.4
6 April 202620.333.2
7 April 20262135.6
8 April 202622.634.8
9 April 202622.934.1
10 April 202622.637
11 April 202624.940.6
12 April 202625.240.2
13 April 20262639.3
14 April 202624.840.7
15 April 202626.239.7
16 April 202624.539.3
17 April 202624.240.5
18 April 202626.338.8
19 April 202627.341.5
20 April 202625.839
21 April 202627.140.8
22 April 202627.739.7
23 April 202626.640.9
24 April 202628.440.8
25 April 202628.640.2
26 April 202628.441.5
27 April 202625.840.1
28 April 202626.240
29 April 202625.539.9
30 April 202625.837.1
Baner station values. Daily highs and lows come from the daily cache.
Rain, day by day (April)
Grey line: 2.5 mm, the rainy-day threshold (IMD). 1 rainy day; 3 days with 0.3 mm or more.
Daily rainfall, April 2026Bar chart of rain per day in April 2026. 1 days reached 2.5 mm; the wettest day was 2 April 2026 with 36.2 mm.010203040mm per day2 April 2026: 36.2 mm (rainy day)5 April 2026: 0.4 mm22 April 2026: 1 mm24 April 2026: 0.2 mm (trace)2.5 mm rainy-day threshold36.2 mm18152229
Show the numbers
Rain, day by day (April)
DayRain mm
1 April 20260
2 April 202636.2
3 April 20260
4 April 20260
5 April 20260.4
6 April 20260
7 April 20260
8 April 20260
9 April 20260
10 April 20260
11 April 20260
12 April 20260
13 April 20260
14 April 20260
15 April 20260
16 April 20260
17 April 20260
18 April 20260
19 April 20260
20 April 20260
21 April 20260
22 April 20261
23 April 20260
24 April 20260.2
25 April 20260
26 April 20260
27 April 20260
28 April 20260
29 April 20260
30 April 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 April — Baner Hill

Confirmed detections
1,458
≥ 0.70 confidence
Confirmed species
29
≥ 0.70 confidence
Peak hour
8:00 AM
IST
Most active
Asian Koel
835 detections
When the hill sings: birds by hour
Confirmed detections per IST hour, whole month. Shaded: the dawn window, 05:00–07:59, with 32% 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 391. 32% fell between 05:00 and 07:59.Dawn window 05:00–07:59 IST0100200300400detections00:00–00:59 IST: 1 confirmed detections01:00–01:59 IST: 5 confirmed detections02:00–02:59 IST: 5 confirmed detections03:00–03:59 IST: 10 confirmed detections04:00–04:59 IST: 12 confirmed detections05:00–05:59 IST: 72 confirmed detections06:00–06:59 IST: 105 confirmed detections07:00–07:59 IST: 293 confirmed detections08:00–08:59 IST: 391 confirmed detections09:00–09:59 IST: 115 confirmed detections10:00–10:59 IST: 2 confirmed detections11:00–11:59 IST: 3 confirmed detections13:00–13:59 IST: 9 confirmed detections17:00–17:59 IST: 45 confirmed detections18:00–18:59 IST: 223 confirmed detections19:00–19:59 IST: 130 confirmed detections21:00–21:59 IST: 12 confirmed detections22:00–22:59 IST: 9 confirmed detections23:00–23:59 IST: 16 confirmed detectionspeak 08:00, 3910006121823
Show the numbers
When the hill sings: birds by hour
Hour (IST)Confirmed detections
00:001
01:005
02:005
03:0010
04:0012
05:0072
06:00105
07:00293
08:00391
09:00115
10:002
11:003
12:000
13:009
14:000
15:000
16:000
17:0045
18:00223
19:00130
20:000
21:0012
22:009
23:0016
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)1,45829
≥ 0.503,14545
≥ 0.305,91363
All recorded (≥ 0.15) · candidates10,98195

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
    Asian Koel
    ©Photo: Challiyan, via Wikimedia Commons · CC BY-SA 4.0
    Asian KoelEudynamys scolopaceus835 (60%)
  2. #2
    Red-wattled Lapwing
    ©Photo: Shantanu Kuveskar, via Wikimedia Commons · CC BY-SA 4.0
    Red-wattled LapwingVanellus indicus338 (24%)
  3. #3
    Gray Francolin
    ©Photo: Tisha Mukherjee, via Wikimedia Commons · CC BY-SA 4.0
    Gray FrancolinOrtygornis pondicerianus80 (6%)
  4. #4
    Ashy Prinia
    ©Photo: Tisha Mukherjee, via Wikimedia Commons · CC BY-SA 4.0
    Ashy PriniaPrinia socialis39 (3%)
  5. #5
    Black-crowned Night-Heron
    ©Photo: ramidos, via Wikimedia Commons · CC BY 4.0
    Black-crowned Night-HeronNycticorax nycticorax28 (2%)
  6. #6
    Osprey
    ©Photo: Chuck Homler / Focus On Wildlife, via Wikimedia Commons · CC BY-SA 4.0
    OspreyPandion haliaetus27 (2%)
  7. #7
    Tree Pipit
    ©Photo: Imran Shah from Islamabad, Pakistan, via Wikimedia Commons · CC BY-SA 2.0
    Tree PipitAnthus trivialis19 (1%)
  8. #8
    Large-billed Crow
    ©Photo: Laitche, via Wikimedia Commons · CC BY-SA 4.0
    Large-billed CrowCorvus macrorhynchos13 (1%)
  9. #9
    Shikra
    ©Photo: Ravi Vaidyanathan, via Wikimedia Commons · CC BY 2.5
    ShikraAccipiter badius12 (1%)
  10. #10
    Green Sandpiper
    ©Photo: Swardeepak, via Wikimedia Commons · CC BY-SA 4.0
    Green SandpiperTringa ochropus9 (1%)

View live bird detection log →

Birds · who rose, who fell

Species momentum vs March 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)

  • Tree Pipit
    ©Photo: Imran Shah from Islamabad, Pakistan, via Wikimedia Commons · CC BY-SA 2.0
    Tree PipitAnthus trivialis2 → 19 (+850%)
  • Large-billed Crow
    ©Photo: Laitche, via Wikimedia Commons · CC BY-SA 4.0
    Large-billed CrowCorvus macrorhynchos1 → 13 (+1,200%)

Less active (0)

None this month.

Heard this month, not last month (25)Asian Koel, Red-wattled Lapwing, Gray Francolin, Ashy Prinia …
  • Asian Koel
    ©Photo: Challiyan, via Wikimedia Commons · CC BY-SA 4.0
    Asian KoelEudynamys scolopaceus835 this month · not heard last month
  • Red-wattled Lapwing
    ©Photo: Shantanu Kuveskar, via Wikimedia Commons · CC BY-SA 4.0
    Red-wattled LapwingVanellus indicus338 this month · not heard last month
  • Gray Francolin
    ©Photo: Tisha Mukherjee, via Wikimedia Commons · CC BY-SA 4.0
    Gray FrancolinOrtygornis pondicerianus80 this month · not heard last month
  • Ashy Prinia
    ©Photo: Tisha Mukherjee, via Wikimedia Commons · CC BY-SA 4.0
    Ashy PriniaPrinia socialis39 this month · not heard last month
  • Black-crowned Night-Heron
    ©Photo: ramidos, via Wikimedia Commons · CC BY 4.0
    Black-crowned Night-HeronNycticorax nycticorax28 this month · not heard last month
  • Osprey
    ©Photo: Chuck Homler / Focus On Wildlife, via Wikimedia Commons · CC BY-SA 4.0
    OspreyPandion haliaetus27 this month · not heard last month
  • Shikra
    ©Photo: Ravi Vaidyanathan, via Wikimedia Commons · CC BY 2.5
    ShikraAccipiter badius12 this month · not heard last month
  • Green Sandpiper
    ©Photo: Swardeepak, via Wikimedia Commons · CC BY-SA 4.0
    Green SandpiperTringa ochropus9 this month · not heard last month
  • Indian Robin
    ©Photo: Shino jacob koottanad, via Wikimedia Commons · CC BY-SA 4.0
    Indian RobinCopsychus fulicatus7 this month · not heard last month
  • Common Sandpiper
    ©Photo: JJ Harrison ( https://www.jjharrison.com.au/ ), via Wikimedia Commons · CC BY 3.0
    Common SandpiperActitis hypoleucos7 this month · not heard last month
  • White-throated Kingfisher
    ©Photo: Charles J. Sharp, via Wikimedia Commons · CC BY-SA 4.0
    White-throated KingfisherHalcyon smyrnensis6 this month · not heard last month
  • Common Myna
    ©Photo: Gerrie van Vuuren, via Wikimedia Commons · CC BY-SA 4.0
    Common MynaAcridotheres tristis5 this month · not heard last month
  • Eurasian Coot
    ©Photo: Alexis Lours, via Wikimedia Commons · CC BY 4.0
    Eurasian CootFulica atra5 this month · not heard last month
  • Eurasian Moorhen
    ©Photo: Alexis Lours, via Wikimedia Commons · CC BY 4.0
    Eurasian MoorhenGallinula chloropus4 this month · not heard last month
  • Red-vented Bulbul
    ©Photo: Mahmadanesh, via Wikimedia Commons · CC BY 4.0
    Red-vented BulbulPycnonotus cafer3 this month · not heard last month

Showing 15 of 25.

Heard last month, not this month (1)Black-headed Gull
  • Black-headed Gull
    ©Photo: Hans Hillewaert, via Wikimedia Commons · CC BY-SA 3.0
    Black-headed GullChroicocephalus ridibundus1 last month · none this month
Stable (2)Rose-ringed Parakeet, Eurasian Kestrel
  • Rose-ringed Parakeet
    ©Photo: danielskatz, via Wikimedia Commons · CC BY 4.0
    Rose-ringed ParakeetPsittacula krameri1 → 4 (+300%)
  • Eurasian Kestrel
    ©Photo: Andreas Trepte, via Wikimedia Commons · CC BY-SA 2.5
    Eurasian KestrelFalco tinnunculus1 → 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
0.378
median 0.359; middle 80% 0.09–0.722
Last month
No data
No valid readings last month.
Valid readings
129
of 202 raw on 7 days; 73 outside 0–1 excluded
Soundscape index, day by day (April)
Daily mean NDSI from valid readings (0 to 1).
Daily mean NDSI, AprilLine chart of the daily mean soundscape index (NDSI) for each day of April, between 0.329 and 0.492; monthly mean 0.378.0.30.350.40.450.5NDSI (0–1)24 April 2026: mean NDSI 0.373 from 14 readings25 April 2026: mean NDSI 0.371 from 14 readings26 April 2026: mean NDSI 0.492 from 9 readings27 April 2026: mean NDSI 0.329 from 13 readings28 April 2026: mean NDSI 0.424 from 20 readings29 April 2026: mean NDSI 0.371 from 30 readings30 April 2026: mean NDSI 0.345 from 29 readings18152229
Show the numbers
Soundscape index, day by day (April)
DayMean NDSIReadings
24 April 20260.37314
25 April 20260.37114
26 April 20260.4929
27 April 20260.32913
28 April 20260.42420
29 April 20260.37130
30 April 20260.34529
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 April 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: April mean temperature, 1980–2021
Reanalysis model (Copernicus / ECMWF), one value per year, its own axis. Grey line: 1981–2010 normal, 28.1 °C.
April mean temperature, ERA5 reanalysis, 1980–2021Line chart of the April mean temperature for each year from 1980 to 2021 on ERA5. Values range from 26.4 °C in 1997 to 29.6 °C in 2009. The 1981–2010 normal is 28.1 °C.2627282930°C (mean)1981–2010 normal 28.1 °C2009 warmest, 29.61997 coolest, 26.41980: 29.43 °C mean (ERA5)1981: 28.03 °C mean (ERA5)1982: 27.13 °C mean (ERA5)1983: 26.63 °C mean (ERA5)1984: 28.51 °C mean (ERA5)1985: 27.49 °C mean (ERA5)1986: 28.56 °C mean (ERA5)1987: 28.39 °C mean (ERA5)1988: 28.45 °C mean (ERA5)1989: 28.14 °C mean (ERA5)1990: 27.59 °C mean (ERA5)1991: 27.62 °C mean (ERA5)1992: 28.21 °C mean (ERA5)1993: 27.7 °C mean (ERA5)1994: 26.97 °C mean (ERA5)1995: 28.32 °C mean (ERA5)1996: 27.53 °C mean (ERA5)1997: 26.4 °C mean (ERA5)1998: 28.75 °C mean (ERA5)1999: 27.68 °C mean (ERA5)2000: 28.01 °C mean (ERA5)2001: 28.57 °C mean (ERA5)2002: 28.79 °C mean (ERA5)2003: 28.73 °C mean (ERA5)2004: 27.99 °C mean (ERA5)2005: 28.67 °C mean (ERA5)2006: 27.84 °C mean (ERA5)2007: 28.85 °C mean (ERA5)2008: 28.4 °C mean (ERA5)2009: 29.58 °C mean (ERA5)2010: 29.53 °C mean (ERA5)2011: 28.05 °C mean (ERA5)2012: 28.56 °C mean (ERA5)2013: 27.9 °C mean (ERA5)2014: 28.89 °C mean (ERA5)2015: 27.21 °C mean (ERA5)2016: 29.05 °C mean (ERA5)2017: 27.95 °C mean (ERA5)2018: 27.86 °C mean (ERA5)2019: 28.66 °C mean (ERA5)2020: 28.72 °C mean (ERA5)2021: 27.96 °C mean (ERA5)19801990200020102020
Show the numbers
ERA5: April mean temperature, 1980–2021
YearMean °CMax °C (avg)Min °C (avg)
198029.4337.522.28
198128.0336.5720.65
198227.1335.5520.23
198326.6335.4619.2
198428.5136.8521.4
198527.4936.2719.91
198628.5637.4621.11
198728.3936.8821.25
198828.4536.5221.78
198928.1436.5120.72
199027.5936.7319.63
199127.6235.4420.85
199228.2136.5120.87
199327.736.1220.08
199426.9734.6920.13
199528.3236.2921.18
199627.5335.9220.47
199726.434.1719.75
199828.7536.9721.57
199927.6836.1520.4
200028.0136.4321.07
200128.5736.3721.65
200228.7937.121.42
200328.7336.821.84
200427.9936.6320.61
200528.6736.9121.3
200627.8436.5220.39
200728.8537.221.72
200828.436.6221.03
200929.5837.5822.23
201029.5337.7622.34
201128.0536.2220.78
201228.5637.1821.22
201327.936.7320.15
201428.8937.121.52
201527.2135.2520.57
201629.0537.6321.94
201727.9536.6620.37
201827.8636.5720.57
201928.6637.5521.01
202028.7236.9921.49
202127.9636.1220.73
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: April rainfall, 1980–2021
Wettest 1991 (28 mm), driest 1990 (0 mm). Grey line: 1981–2010 normal, 9 mm.
April rainfall, ERA5 reanalysis, 1980–2021Bar chart of April rain totals per year on ERA5, from 0 mm in 1990 to 28 mm in 1991. The 1981–2010 normal is 9 mm.051015202530mm (month total)1980: 12.8 mm, 1 rainy days (ERA5)1981: 7.2 mm, 0 rainy days (ERA5)1982: 7.1 mm, 1 rainy days (ERA5)1983: 0.5 mm, 0 rainy days (ERA5)1984: 1.2 mm, 0 rainy days (ERA5)1985: 4.4 mm, 1 rainy days (ERA5)1986: 6 mm, 1 rainy days (ERA5)1987: 4 mm, 0 rainy days (ERA5)1988: 24.1 mm, 2 rainy days (ERA5)1989: 6.4 mm, 0 rainy days (ERA5)1990: 0 mm, 0 rainy days (ERA5)1991: 28.3 mm, 5 rainy days (ERA5)1992: 0.5 mm, 0 rainy days (ERA5)1993: 7.7 mm, 2 rainy days (ERA5)1994: 17.9 mm, 3 rainy days (ERA5)1995: 12.2 mm, 0 rainy days (ERA5)1996: 11.6 mm, 2 rainy days (ERA5)1997: 18.4 mm, 2 rainy days (ERA5)1998: 3 mm, 0 rainy days (ERA5)1999: 1.8 mm, 0 rainy days (ERA5)2000: 5.1 mm, 0 rainy days (ERA5)2001: 1.5 mm, 0 rainy days (ERA5)2002: 16.4 mm, 2 rainy days (ERA5)2003: 9.8 mm, 2 rainy days (ERA5)2004: 1.3 mm, 0 rainy days (ERA5)2005: 21.6 mm, 2 rainy days (ERA5)2006: 1.3 mm, 0 rainy days (ERA5)2007: 17 mm, 1 rainy days (ERA5)2008: 10.2 mm, 2 rainy days (ERA5)2009: 0.3 mm, 0 rainy days (ERA5)2010: 12.6 mm, 1 rainy days (ERA5)2011: 9.9 mm, 1 rainy days (ERA5)2012: 14.7 mm, 2 rainy days (ERA5)2013: 3.2 mm, 1 rainy days (ERA5)2014: 14.3 mm, 1 rainy days (ERA5)2015: 11 mm, 2 rainy days (ERA5)2016: 11.2 mm, 2 rainy days (ERA5)2017: 0.2 mm, 0 rainy days (ERA5)2018: 7.4 mm, 1 rainy days (ERA5)2019: 0.8 mm, 0 rainy days (ERA5)2020: 0.8 mm, 0 rainy days (ERA5)2021: 1 mm, 0 rainy days (ERA5)1981–2010 normal 8.6 mm19801990200020102020
Show the numbers
ERA5: April rainfall, 1980–2021
YearRain mmRainy days
198012.81
19817.20
19827.11
19830.50
19841.20
19854.41
198661
198740
198824.12
19896.40
199000
199128.35
19920.50
19937.72
199417.93
199512.20
199611.62
199718.42
199830
19991.80
20005.10
20011.50
200216.42
20039.82
20041.30
200521.62
20061.30
2007171
200810.22
20090.30
201012.61
20119.91
201214.72
20133.21
201414.31
2015112
201611.22
20170.20
20187.41
20190.80
20200.80
202110
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: April temperature
Dot = monthly average; line = lowest to highest reading.
Open-Meteo model estimateBaner Weather Union station
April temperature, Earth Pulse record 2022–2026For each April from 2022 to 2026, a vertical line from the lowest to the highest temperature with a dot at the monthly average. 2022 average 29.6 °C (Open-Meteo model); 2023 average 27.2 °C (Open-Meteo model); 2024 average 30.4 °C (Open-Meteo model); 2025 average 29.3 °C (Open-Meteo model); 2026 average 30.7 °C (Baner station).15202530354045°C2022 (Open-Meteo model): average 29.6 °C, lowest 19.1 °C, highest 41 °C2022 (Open-Meteo model): average 29.6 °C, lowest 19.1 °C, highest 41 °C29.620222023 (Open-Meteo model): average 27.2 °C, lowest 16 °C, highest 37.5 °C2023 (Open-Meteo model): average 27.2 °C, lowest 16 °C, highest 37.5 °C27.220232024 (Open-Meteo model): average 30.4 °C, lowest 18.5 °C, highest 41 °C2024 (Open-Meteo model): average 30.4 °C, lowest 18.5 °C, highest 41 °C30.420242025 (Open-Meteo model): average 29.3 °C, lowest 18.8 °C, highest 41.6 °C2025 (Open-Meteo model): average 29.3 °C, lowest 18.8 °C, highest 41.6 °C29.320252026 (Baner station): average 30.7 °C, lowest 19.6 °C, highest 41.5 °C2026 (Baner station): average 30.7 °C, lowest 19.6 °C, highest 41.5 °C30.72026
Show the numbers
Earth Pulse record: April temperature
YearSourceAverage °CLowest °CHighest °C
2022Open-Meteo model29.619.141
2023Open-Meteo model27.21637.5
2024Open-Meteo model30.418.541
2025Open-Meteo model29.318.841.6
2026Baner station30.719.641.5
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: April rainfall
Month total in mm; colour shows the source.
Open-Meteo model estimateBaner Weather Union station
April rainfall, Earth Pulse record 2022–2026Bar chart of April rain totals: 2022 0.2 mm (Open-Meteo model); 2023 6.6 mm (Open-Meteo model); 2024 1.2 mm (Open-Meteo model); 2025 8 mm (Open-Meteo model); 2026 37.8 mm (Baner station).010203040mm (month total)2022 (Open-Meteo model): 0.2 mm, 0 rainy days020222023 (Open-Meteo model): 6.6 mm, 0 rainy days720232024 (Open-Meteo model): 1.2 mm, 0 rainy days120242025 (Open-Meteo model): 8 mm, 1 rainy days820252026 (Baner station): 37.8 mm, 1 rainy days382026
Show the numbers
Earth Pulse record: April rainfall
YearSourceRain mmRainy days
2022Open-Meteo model0.20
2023Open-Meteo model6.60
2024Open-Meteo model1.20
2025Open-Meteo model81
2026Baner station37.81
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 ★65.631–8702930
202566.639–10702930
202465.137–7803030
202369.436–9403030
2022——–—0030

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 April 2026

  • Hottest day: 19 April 2026, 41.5 °C
  • Coolest night: 2 April 2026, 19.6 °C
  • Rainiest day: 2 April 2026, 36.2 mm
  • Cleanest air: 30 April 2026, daily-average EU AQI 37.1
  • Haziest air: 10 April 2026, daily-average EU AQI 81.5

How this April ranks

  • Average AQI: the 2nd lowest (cleanest) of 4 Aprils 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 April was 2009 and the wettest 1991. ERA5 is never ranked together with Earth Pulse values.

Looking ahead · not a forecast

What a typical May looks like

Mean temperature
27.6 °C
average daily max 34.9 °C, min 22.1 °C
Rain
23 mm
on about 2 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

April 2026 in Baner: frequently asked questions

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

The average EU AQI in Baner in April 2026 was 65.6 (range 31–87; lower is cleaner), cleaner than March 2026 (68.1). 0 of 30 complete days were clean-air days, meaning the worst hour stayed at EU AQI 40 or below, and 29 were high-pollution days (worst hour 61 or more). Counting daily averages instead, 3% of days averaged EU AQI 40 or below.

How much rain fell in Baner in April 2026?

Baner received 37.8 mm of rain in April 2026 (Baner Weather Union station), wetter than March 2026 (32 mm). 1 day was a rainy day under the IMD rule of 2.5 mm or more in an IST day; 3 days had at least 0.3 mm. The wettest day was 2 April 2026 with 36.2 mm.

How hot was Baner in April 2026?

Temperatures in Baner ranged from 19.6 °C to 41.5 °C in April 2026, with a monthly average of 30.7 °C (Baner Weather Union station). That was warmer than March 2026 (29.2 °C); the hottest day was 19 April 2026 at 41.5 °C. April 2025 averaged 29.3 °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 April 2026?

BirdNET confirmed 29 bird species from 1,458 detections at confidence 0.70 or higher on Baner Hill in April 2026. The most active confirmed species was the Asian Koel (835 detections), and birds called most at 08:00 IST. Counting every recorded detection, including lower-confidence candidates, there were 95 candidate species in 10,981 detections.

How natural did Baner Hill sound in April 2026?

The mean soundscape index (NDSI, 0 to 1; higher means more natural sound relative to human noise) was 0.378 in April 2026, with a median of 0.359 from 129 valid readings.

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

On ERA5 reanalysis (Copernicus / ECMWF), the 1981–2010 normal for April in the Baner grid cell is 28.1 °C with 8.6 mm of rain. Compared with itself, ERA5 changed by +0.39 °C between 1981–90 and 2012–21. ERA5 is a 30 km model grid, so it is shown beside this month's readings (30.7 °C, 37.8 mm), not subtracted from them.

Week by week

Weekly reports for April 2026

Week of 30 Mar – 5 AprWeek of 6 Apr – 12 AprWeek of 13 Apr – 19 AprWeek of 20 Apr – 26 AprWeek of 27 Apr – 3 May

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

We continue to monitor the environmental pulse of Baner and the Western Ghats.
💨 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.