Bihārīganj climate — normals and trends
Bihārīganj (India) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 25.1 °C and it receives 1,524 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 (29.7 °C on average) and the coldest is January (16.6 °C). Rainfall peaks in July.
Bihārīganj averages 0 frost days, 217 hot days (≥ 30 °C) and 144 rainy days per year.
Bihārīganj 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 7 June 1964) and the coldest 3.0 °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
BihārīganjBihar
- coords
- 25.73°, 86.99°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.1°C
Average daily high
30.7°C
Average daily low
20.5°C
Annual rainfall
1,524mm
Sunshine / day
9.6h
Mean relative humidity
71%
Average peak wind
14.0km/h
Seasonal range
13.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
217 d/yr
Rainy days (≥ 1 mm)
144 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.7 °C
Average feels-like low
22.5 °C
Average peak gust
29.9 km/h
Tropical nights (≥ 20 °C)
219 d/yr
Solar radiation
17.3 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
7 June 1964
Coldest day
3.0 °C
9 January 2013
Wettest day
240 mm
18 July 1969
Windiest day
42.6 km/h
10 November 1995
Strongest gust
91.1 km/h
17 October 1985
Hottest feels-like
49.6 °C
15 June 1957
Coldest feels-like
0.4 °C
9 January 2013
Sunniest day
13.1 h
5 June 1979
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 | 22.9 °C | -0.8 °C | 1 mm | -18 mm |
| Feb | 27.2 °C | +0.3 °C | 3 mm | -14 mm |
| Mar | 31.8 °C | -0.9 °C | 18 mm | -4 mm |
| Apr | 33.6 °C | -2.6 °C | 87 mm | +42 mm |
| May | 33.6 °C | -1.7 °C | 275 mm | +164 mm |
| Jun | 33.9 °C | +0.2 °C | 153 mm | -99 mm |
| Jul | 33.0 °C | +1.0 °C | 257 mm | -111 mm |
| Aug | 32.7 °C | +0.8 °C | 307 mm | -1 mm |
| Sep | 33.3 °C | +1.9 °C | 288 mm | +22 mm |
| Oct | 31.3 °C | +0.8 °C | 333 mm | +231 mm |
| Nov | 28.7 °C | +0.2 °C | 8 mm | -1 mm |
| Dec | 23.2 °C | -2.2 °C | 0 mm | -7 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 Bihārīganj?
Bihārīganj has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 25.1 °C and it receives 1,524 mm of precipitation per year.
What is the hottest day ever recorded in Bihārīganj?
The hottest day measured in Bihārīganj between 1940 and 2025 was 7 June 1964, reaching 46.7 °C.
What is the coldest day in Bihārīganj?
The coldest day measured in Bihārīganj between 1940 and 2025 was 9 January 2013, at 3.0 °C.
Does it snow in Bihārīganj?
Almost never: Bihārīganj sees virtually no snow, with about 0 frost days per year.
Has the climate of Bihārīganj warmed?
Yes: Bihārīganj warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bihārīganj?
The wettest day measured in Bihārīganj between 1940 and 2025 was 18 July 1969, with 240 mm of rain in 24 hours.
What was the windiest day in Bihārīganj?
The windiest day measured in Bihārīganj between 1940 and 2025 was 10 November 1995, with winds reaching 42.6 km/h.
What is the warmest month in Bihārīganj?
The warmest month in Bihārīganj is May (29.7 °C on average); the coldest is January (16.6 °C).
How much does it rain in Bihārīganj?
Bihārīganj receives on average 1,524 mm of precipitation per year, spread over about 144 rainy days.
Is it sunny in Bihārīganj?
Bihārīganj gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
Are there tropical nights in Bihārīganj?
Yes: Bihārīganj has on average 219 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bihārīganj?
In Bihārīganj, between 1940 and 2025, the highest apparent temperature reached 49.6 °C on 15 June 1957, and the lowest was 0.4 °C on 9 January 2013.
Compare Bihārīganj with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bihārīganj