Purnia climate — normals and trends
Purnia (India) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 25.0 °C and it receives 1,655 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 (29.0 °C on average) and the coldest is January (16.8 °C). Rainfall peaks in July.
Purnia averages 0 frost days, 215 hot days (≥ 30 °C) and 151 rainy days per year.
Purnia 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 46.6 °C (on 26 May 1957) and the coldest 3.5 °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
PurniaBihar
- coords
- 25.78°, 87.47°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.0°C
Average daily high
30.5°C
Average daily low
20.6°C
Annual rainfall
1,655mm
Sunshine / day
9.5h
Mean relative humidity
72%
Average peak wind
13.9km/h
Seasonal range
12.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
215 d/yr
Rainy days (≥ 1 mm)
151 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.5 °C
Average feels-like low
22.6 °C
Average peak gust
28.5 km/h
Tropical nights (≥ 20 °C)
221 d/yr
Solar radiation
17.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.37 · 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
46.6 °C
26 May 1957
Coldest day
3.5 °C
9 January 2013
Wettest day
220 mm
13 August 1995
Windiest day
45.1 km/h
17 October 1985
Strongest gust
88.6 km/h
26 May 2009
Hottest feels-like
48.2 °C
25 May 1957
Coldest feels-like
1.1 °C
9 January 2013
Sunniest day
13.2 h
6 June 1944
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 | 23.2 °C | -0.6 °C | 0 mm | -17 mm |
| Feb | 27.3 °C | +0.3 °C | 2 mm | -14 mm |
| Mar | 31.9 °C | -0.7 °C | 18 mm | -6 mm |
| Apr | 33.2 °C | -2.4 °C | 130 mm | +71 mm |
| May | 32.9 °C | -1.3 °C | 269 mm | +119 mm |
| Jun | 33.8 °C | +0.9 °C | 207 mm | -85 mm |
| Jul | 33.1 °C | +1.2 °C | 294 mm | -84 mm |
| Aug | 32.8 °C | +0.9 °C | 315 mm | -7 mm |
| Sep | 33.4 °C | +1.9 °C | 339 mm | +63 mm |
| Oct | 31.6 °C | +1.0 °C | 306 mm | +199 mm |
| Nov | 29.0 °C | +0.4 °C | 46 mm | +36 mm |
| Dec | 23.5 °C | -1.9 °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 Purnia?
Purnia has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 25.0 °C and it receives 1,655 mm of precipitation per year.
What is the hottest day ever recorded in Purnia?
The hottest day measured in Purnia between 1940 and 2025 was 26 May 1957, reaching 46.6 °C.
What is the coldest day in Purnia?
The coldest day measured in Purnia between 1940 and 2025 was 9 January 2013, at 3.5 °C.
Does it snow in Purnia?
Almost never: Purnia sees virtually no snow, with about 0 frost days per year.
Has the climate of Purnia warmed?
Yes: Purnia warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Purnia?
The wettest day measured in Purnia between 1940 and 2025 was 13 August 1995, with 220 mm of rain in 24 hours.
What was the windiest day in Purnia?
The windiest day measured in Purnia between 1940 and 2025 was 17 October 1985, with winds reaching 45.1 km/h.
What is the warmest month in Purnia?
The warmest month in Purnia is May (29.0 °C on average); the coldest is January (16.8 °C).
How much does it rain in Purnia?
Purnia receives on average 1,655 mm of precipitation per year, spread over about 151 rainy days.
Is it sunny in Purnia?
Purnia gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
Are there tropical nights in Purnia?
Yes: Purnia has on average 221 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Purnia?
In Purnia, between 1940 and 2025, the highest apparent temperature reached 48.2 °C on 25 May 1957, and the lowest was 1.1 °C on 9 January 2013.
Compare Purnia with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Purnia