Supaul climate — normals and trends
Supaul (India) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 25.3 °C and it receives 1,444 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is May (30.3 °C on average) and the coldest is January (16.6 °C). Rainfall peaks in July.
Supaul averages 0 frost days, 222 hot days (≥ 30 °C) and 136 rainy days per year.
Supaul has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.7 °C (on 26 May 1957) and the coldest 3.8 °C (on 9 January 2013).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
SupaulBihar
- coords
- 26.12°, 86.60°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.3°C
Average daily high
30.9°C
Average daily low
20.6°C
Annual rainfall
1,444mm
Sunshine / day
9.9h
Mean relative humidity
70%
Average peak wind
14.5km/h
Seasonal range
13.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
222 d/yr
Rainy days (≥ 1 mm)
136 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.7 °C
Average feels-like low
22.6 °C
Average peak gust
30.2 km/h
Tropical nights (≥ 20 °C)
221 d/yr
Solar radiation
17.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.32 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
46.7 °C
26 May 1957
Coldest day
3.8 °C
9 January 2013
Wettest day
257 mm
21 September 2000
Windiest day
44.9 km/h
10 November 1995
Strongest gust
90.4 km/h
17 October 1985
Hottest feels-like
48.7 °C
30 May 1987
Coldest feels-like
1.1 °C
9 January 2013
Sunniest day
13.1 h
2 June 1942
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 22.7 °C | -0.9 °C | 0 mm | -16 mm |
| Feb | 27.3 °C | +0.4 °C | 3 mm | -13 mm |
| Mar | 32.1 °C | -0.7 °C | 10 mm | -8 mm |
| Apr | 33.7 °C | -2.9 °C | 122 mm | +87 mm |
| May | 33.8 °C | -2.4 °C | 157 mm | +76 mm |
| Jun | 34.6 °C | +0.3 °C | 141 mm | -93 mm |
| Jul | 33.7 °C | +1.5 °C | 239 mm | -137 mm |
| Aug | 32.8 °C | +0.7 °C | 327 mm | +12 mm |
| Sep | 33.4 °C | +1.8 °C | 278 mm | +22 mm |
| Oct | 31.4 °C | +0.6 °C | 344 mm | +259 mm |
| Nov | 29.0 °C | +0.3 °C | 3 mm | -4 mm |
| Dec | 23.1 °C | -2.2 °C | 0 mm | -6 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Supaul?
Supaul has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 25.3 °C and it receives 1,444 mm of precipitation per year.
What is the hottest day ever recorded in Supaul?
The hottest day measured in Supaul between 1940 and 2025 was 26 May 1957, reaching 46.7 °C.
What is the coldest day in Supaul?
The coldest day measured in Supaul between 1940 and 2025 was 9 January 2013, at 3.8 °C.
Does it snow in Supaul?
Almost never: Supaul sees virtually no snow, with about 0 frost days per year.
Has the climate of Supaul warmed?
Yes: Supaul warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Supaul?
The wettest day measured in Supaul between 1940 and 2025 was 21 September 2000, with 257 mm of rain in 24 hours.
What was the windiest day in Supaul?
The windiest day measured in Supaul between 1940 and 2025 was 10 November 1995, with winds reaching 44.9 km/h.
What is the warmest month in Supaul?
The warmest month in Supaul is May (30.3 °C on average); the coldest is January (16.6 °C).
How much does it rain in Supaul?
Supaul receives on average 1,444 mm of precipitation per year, spread over about 136 rainy days.
Is it sunny in Supaul?
Supaul gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
Are there tropical nights in Supaul?
Yes: Supaul has on average 221 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Supaul?
In Supaul, between 1940 and 2025, the highest apparent temperature reached 48.7 °C on 30 May 1987, and the lowest was 1.1 °C on 9 January 2013.
Compare Supaul with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Supaul