Bakhtiarpur climate — normals and trends
Bakhtiarpur (India) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 25.7 °C and it receives 1,182 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 (32.0 °C on average) and the coldest is January (16.5 °C). Rainfall peaks in July.
Bakhtiarpur averages 0 frost days, 227 hot days (≥ 30 °C) and 120 rainy days per year.
Bakhtiarpur has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.6 °C (on 14 June 1960) and the coldest 3.7 °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
BakhtiarpurBihar
- coords
- 25.46°, 85.53°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.7°C
Average daily high
31.2°C
Average daily low
21.1°C
Annual rainfall
1,182mm
Sunshine / day
10.0h
Mean relative humidity
68%
Average peak wind
14.7km/h
Seasonal range
15.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
227 d/yr
Rainy days (≥ 1 mm)
120 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.8 °C
Average feels-like low
23.1 °C
Average peak gust
29.9 km/h
Tropical nights (≥ 20 °C)
223 d/yr
Solar radiation
18.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.16 · 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
14 June 1960
Coldest day
3.7 °C
9 January 2013
Wettest day
240 mm
30 September 1971
Windiest day
44.8 km/h
23 September 1962
Strongest gust
82.1 km/h
23 September 1962
Hottest feels-like
50.7 °C
31 May 1998
Coldest feels-like
0.9 °C
31 January 1964
Sunniest day
13.0 h
29 May 1940
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 | 21.7 °C | -1.3 °C | 0 mm | -21 mm |
| Feb | 27.5 °C | +0.9 °C | 0 mm | -18 mm |
| Mar | 32.6 °C | -0.3 °C | 9 mm | -8 mm |
| Apr | 36.1 °C | -1.5 °C | 33 mm | +15 mm |
| May | 36.4 °C | -1.9 °C | 52 mm | +12 mm |
| Jun | 35.9 °C | -0.3 °C | 149 mm | -8 mm |
| Jul | 33.5 °C | +0.9 °C | 304 mm | -24 mm |
| Aug | 32.6 °C | +0.4 °C | 306 mm | +29 mm |
| Sep | 33.3 °C | +1.5 °C | 241 mm | +27 mm |
| Oct | 30.9 °C | +0.1 °C | 257 mm | +183 mm |
| Nov | 28.2 °C | -0.1 °C | 1 mm | -8 mm |
| Dec | 22.0 °C | -2.6 °C | 0 mm | -10 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 Bakhtiarpur?
Bakhtiarpur has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 25.7 °C and it receives 1,182 mm of precipitation per year.
What is the hottest day ever recorded in Bakhtiarpur?
The hottest day measured in Bakhtiarpur between 1940 and 2025 was 14 June 1960, reaching 46.6 °C.
What is the coldest day in Bakhtiarpur?
The coldest day measured in Bakhtiarpur between 1940 and 2025 was 9 January 2013, at 3.7 °C.
Does it snow in Bakhtiarpur?
Almost never: Bakhtiarpur sees virtually no snow, with about 0 frost days per year.
Has the climate of Bakhtiarpur warmed?
Yes: Bakhtiarpur warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bakhtiarpur?
The wettest day measured in Bakhtiarpur between 1940 and 2025 was 30 September 1971, with 240 mm of rain in 24 hours.
What was the windiest day in Bakhtiarpur?
The windiest day measured in Bakhtiarpur between 1940 and 2025 was 23 September 1962, with winds reaching 44.8 km/h.
What is the warmest month in Bakhtiarpur?
The warmest month in Bakhtiarpur is May (32.0 °C on average); the coldest is January (16.5 °C).
How much does it rain in Bakhtiarpur?
Bakhtiarpur receives on average 1,182 mm of precipitation per year, spread over about 120 rainy days.
Is it sunny in Bakhtiarpur?
Bakhtiarpur gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
Are there tropical nights in Bakhtiarpur?
Yes: Bakhtiarpur has on average 223 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bakhtiarpur?
In Bakhtiarpur, between 1940 and 2025, the highest apparent temperature reached 50.7 °C on 31 May 1998, and the lowest was 0.9 °C on 31 January 1964.
Compare Bakhtiarpur with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bakhtiarpur