Koch Bihār climate — normals and trends

Q: What is the climate of Koch Bihār?

Koch Bihār has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 24.3 °C and it receives 3,454 mm of precipitation per year.

Q: What is the hottest day ever recorded in Koch Bihār?

The hottest day measured in Koch Bihār between 1940 and 2025 was 21 April 1957, reaching 43.6 °C.

Q: What is the coldest day in Koch Bihār?

The coldest day measured in Koch Bihār between 1940 and 2025 was 28 January 1964, at 6.0 °C.

Q: Does it snow in Koch Bihār?

Almost never: Koch Bihār sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Koch Bihār warmed?

Yes: Koch Bihār warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Koch Bihār?

The wettest day measured in Koch Bihār between 1940 and 2025 was 12 August 2017, with 286 mm of rain in 24 hours.

Q: What was the windiest day in Koch Bihār?

The windiest day measured in Koch Bihār between 1940 and 2025 was 28 May 1989, with winds reaching 45.6 km/h.

Q: What is the warmest month in Koch Bihār?

The warmest month in Koch Bihār is August (28.2 °C on average); the coldest is January (17.3 °C).

Q: How much does it rain in Koch Bihār?

Koch Bihār receives on average 3,454 mm of precipitation per year, spread over about 188 rainy days.

Q: Is it sunny in Koch Bihār?

Koch Bihār gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.

Koch Bihār (India) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 24.3 °C and it receives 3,454 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 August (28.2 °C on average) and the coldest is January (17.3 °C). Rainfall peaks in June.

Koch Bihār averages 0 frost days, 173 hot days (≥ 30 °C) and 188 rainy days per year.

Koch Bihār has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.

The hottest day of the period reached 43.6 °C (on 21 April 1957) and the coldest 6.0 °C (on 28 January 1964).

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

Koch BihārWest Bengal

coords: 26.33°, 89.45°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthAugustColdest monthJanuaryWettest monthJuneDriest monthDecember

Mean daily temperature

24.3°C

Average daily high

29.5°C

Average daily low

20.3°C

Annual rainfall

3,454mm

Sunshine / day

8.8h

Mean relative humidity

76%

Average peak wind

11.3km/h

Seasonal range

10.9°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

173 d/yr

Rainy days (≥ 1 mm)

188 d/yr

Annual snowfall

0.0 cm

Average feels-like high

33.1 °C

Average feels-like low

22.8 °C

Average peak gust

26.5 km/h

Tropical nights (≥ 20 °C)

215 d/yr

Solar radiation

15.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.2 °C

since 1940

+0.1 °C per decade · r² = 0.55 · p = < 0.001

19402025

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

43.6 °C

21 April 1957

Coldest day

6.0 °C

28 January 1964

Wettest day

286 mm

12 August 2017

Windiest day

45.6 km/h

28 May 1989

Strongest gust

97.2 km/h

26 May 2009

Hottest feels-like

47.8 °C

7 June 1964

Coldest feels-like

2.6 °C

31 January 1964

Sunniest day

13.5 h

9 June 1945

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	37.7 °C10 June 2025	10.9 °C11 January 2025	25.2 °C	2,989 mm	211
2024	38.2 °C25 May 2024	9.3 °C28 January 2024	25.1 °C	3,594 mm	216
2023	38.0 °C17 April 2023	9.7 °C10 January 2023	25.2 °C	3,531 mm	220
2022	36.5 °C18 August 2022	8.2 °C30 January 2022	24.8 °C	3,764 mm	194
2021	36.4 °C26 September 2021	9.6 °C31 January 2021	24.9 °C	2,950 mm	213
2020	36.5 °C4 August 2020	9.2 °C7 January 2020	24.5 °C	3,685 mm	188
2019	37.5 °C6 August 2019	8.8 °C29 December 2019	24.8 °C	3,978 mm	196
2018	37.9 °C20 July 2018	6.3 °C8 January 2018	24.6 °C	2,671 mm	195
2017	37.2 °C18 July 2017	6.5 °C14 January 2017	24.8 °C	3,830 mm	177
2016	37.1 °C24 April 2016	9.8 °C13 January 2016	25.0 °C	3,218 mm	213
2015	36.6 °C28 July 2015	9.1 °C1 February 2015	24.5 °C	3,980 mm	178
2014	40.9 °C25 April 2014	9.4 °C9 January 2014	24.8 °C	3,157 mm	211
2013	40.4 °C13 April 2013	6.0 °C11 January 2013	25.0 °C	2,586 mm	217
2012	36.8 °C1 April 2012	7.7 °C16 January 2012	24.5 °C	3,329 mm	208
2011	36.0 °C21 April 2011	7.6 °C12 January 2011	24.6 °C	3,546 mm	207
2010	40.1 °C5 April 2010	8.7 °C6 January 2010	25.0 °C	4,065 mm	203
2009	36.8 °C9 June 2009	10.6 °C10 January 2009	25.3 °C	3,439 mm	224
2008	36.3 °C28 April 2008	8.8 °C2 February 2008	24.6 °C	3,503 mm	181
2007	38.3 °C30 March 2007	8.3 °C15 January 2007	24.7 °C	4,366 mm	186
2006	39.4 °C27 March 2006	10.0 °C1 January 2006	25.3 °C	2,723 mm	223
2005	36.1 °C6 March 2005	10.2 °C3 February 2005	24.7 °C	3,432 mm	187
2004	37.6 °C27 March 2004	8.6 °C28 January 2004	24.5 °C	3,863 mm	171
2003	36.7 °C24 July 2003	7.1 °C23 January 2003	24.2 °C	3,771 mm	158
2002	36.3 °C20 March 2002	10.0 °C2 February 2002	24.5 °C	3,788 mm	175
2001	40.4 °C7 April 2001	8.1 °C11 January 2001	24.9 °C	2,863 mm	215
2000	38.5 °C6 April 2000	8.8 °C8 January 2000	24.4 °C	3,377 mm	186
1999	38.3 °C4 April 1999	9.1 °C12 January 1999	25.0 °C	3,976 mm	209
1998	39.5 °C20 May 1998	9.1 °C20 January 1998	24.8 °C	3,379 mm	194
1997	36.3 °C27 August 1997	9.0 °C18 February 1997	24.1 °C	3,614 mm	177
1996	41.7 °C10 April 1996	10.0 °C20 January 1996	24.8 °C	3,613 mm	180
1995	39.7 °C14 April 1995	8.5 °C3 January 1995	24.7 °C	3,986 mm	209
1994	38.8 °C6 May 1994	9.3 °C27 December 1994	24.6 °C	3,389 mm	205
1993	36.4 °C5 April 1993	7.7 °C21 January 1993	24.1 °C	4,488 mm	154
1992	41.5 °C14 April 1992	8.2 °C24 December 1992	24.3 °C	3,172 mm	189
1991	37.6 °C20 March 1991	8.6 °C31 December 1991	24.1 °C	3,564 mm	165
1990	35.2 °C1 September 1990	8.2 °C2 January 1990	24.2 °C	3,851 mm	155
1989	40.9 °C9 May 1989	7.5 °C13 January 1989	24.3 °C	3,150 mm	177
1988	40.2 °C11 April 1988	8.9 °C27 January 1988	24.7 °C	4,069 mm	193
1987	37.4 °C5 April 1987	9.1 °C9 January 1987	24.5 °C	3,878 mm	159
1986	40.1 °C30 March 1986	8.7 °C26 December 1986	24.4 °C	3,193 mm	162
1985	38.9 °C16 April 1985	8.8 °C9 January 1985	24.4 °C	3,029 mm	161
1984	39.2 °C4 April 1984	7.9 °C26 January 1984	24.0 °C	3,532 mm	156
1983	39.7 °C9 April 1983	6.1 °C6 February 1983	24.2 °C	3,337 mm	182
1982	39.0 °C7 April 1982	8.7 °C5 January 1982	24.4 °C	3,010 mm	194
1981	36.1 °C21 March 1981	7.3 °C9 January 1981	24.3 °C	2,310 mm	192
1980	40.2 °C15 April 1980	7.8 °C9 February 1980	24.6 °C	2,424 mm	200
1979	39.2 °C5 April 1979	8.6 °C9 January 1979	24.8 °C	2,741 mm	178
1978	38.7 °C9 April 1978	7.0 °C9 January 1978	24.3 °C	2,730 mm	195
1977	38.2 °C20 March 1977	7.4 °C5 January 1977	24.0 °C	3,627 mm	149
1976	39.8 °C12 April 1976	7.7 °C12 December 1976	24.5 °C	2,935 mm	183
1975	40.5 °C10 April 1975	8.1 °C15 January 1975	24.4 °C	2,857 mm	181
1974	35.6 °C13 August 1974	8.2 °C6 February 1974	24.0 °C	3,922 mm	149
1973	41.0 °C31 March 1973	8.5 °C16 January 1973	24.7 °C	4,203 mm	168
1972	36.2 °C14 March 1972	8.9 °C19 February 1972	24.2 °C	3,628 mm	165
1971	36.1 °C25 March 1971	7.0 °C30 January 1971	23.8 °C	3,236 mm	138
1970	37.6 °C21 August 1970	9.7 °C3 February 1970	24.1 °C	3,448 mm	176
1969	35.8 °C14 March 1969	7.6 °C16 January 1969	24.0 °C	3,207 mm	178
1968	37.7 °C11 April 1968	7.6 °C30 December 1968	23.8 °C	3,749 mm	150
1967	35.4 °C1 August 1967	7.9 °C3 January 1967	23.8 °C	3,180 mm	140
1966	38.5 °C2 May 1966	9.6 °C17 January 1966	23.9 °C	4,059 mm	132
1965	36.4 °C18 March 1965	9.7 °C9 January 1965	23.6 °C	4,289 mm	129
1964	39.6 °C4 April 1964	6.0 °C28 January 1964	24.6 °C	3,647 mm	192
1963	40.2 °C31 March 1963	7.9 °C20 January 1963	24.3 °C	4,222 mm	180
1962	41.4 °C15 April 1962	7.7 °C16 January 1962	24.3 °C	3,789 mm	173
1961	40.5 °C24 April 1961	6.5 °C25 December 1961	24.3 °C	3,315 mm	180
1960	43.4 °C20 April 1960	7.5 °C2 January 1960	25.1 °C	3,661 mm	197
1959	38.2 °C9 April 1959	9.0 °C2 February 1959	23.9 °C	4,699 mm	137
1958	37.9 °C27 March 1958	10.5 °C20 January 1958	24.5 °C	4,712 mm	161
1957	43.6 °C21 April 1957	8.0 °C13 February 1957	24.7 °C	2,941 mm	192
1956	40.9 °C18 April 1956	9.5 °C4 January 1956	24.2 °C	3,801 mm	161
1955	38.8 °C23 April 1955	8.8 °C3 January 1955	24.3 °C	3,210 mm	163
1954	39.2 °C26 April 1954	9.3 °C26 January 1954	24.1 °C	3,290 mm	139
1953	34.3 °C31 July 1953	7.3 °C26 January 1953	23.3 °C	3,232 mm	84
1952	33.7 °C14 April 1952	9.3 °C31 December 1952	23.5 °C	3,395 mm	122
1951	35.6 °C24 July 1951	9.3 °C24 January 1951	23.6 °C	3,554 mm	122
1950	34.7 °C10 April 1950	7.1 °C13 February 1950	23.4 °C	3,938 mm	110
1949	33.1 °C13 July 1949	9.2 °C23 December 1949	23.3 °C	3,303 mm	95
1948	36.2 °C13 March 1948	9.6 °C19 December 1948	23.9 °C	3,361 mm	150
1947	39.0 °C8 April 1947	9.4 °C16 January 1947	24.3 °C	2,858 mm	165
1946	38.0 °C19 March 1946	10.3 °C25 December 1946	24.2 °C	2,748 mm	167
1945	39.8 °C4 April 1945	7.4 °C8 January 1945	23.8 °C	3,296 mm	156
1944	36.4 °C15 March 1944	9.9 °C12 January 1944	24.1 °C	2,747 mm	154
1943	34.1 °C10 July 1943	8.6 °C2 February 1943	23.1 °C	3,291 mm	95
1942	36.2 °C17 March 1942	10.1 °C25 January 1942	23.8 °C	3,721 mm	127
1941	34.2 °C16 March 1941	8.8 °C12 January 1941	23.6 °C	2,722 mm	141
1940	34.8 °C21 April 1940	9.3 °C7 January 1940	23.5 °C	2,783 mm	131

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?

Year

Across the whole year

Average daily high

30.4 °C

+0.9 °C

Hot days (≥ 30 °C)

211 d/yr

+38

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2989 mm

-465 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	24.7 °C	+0.4 °C	1 mm	-13 mm
Feb	26.6 °C	-0.5 °C	9 mm	-9 mm
Mar	31.1 °C	-0.2 °C	32 mm	-32 mm
Apr	31.9 °C	0.0 °C	209 mm	-6 mm
May	30.6 °C	0.0 °C	774 mm	+217 mm
Jun	33.4 °C	+2.5 °C	361 mm	-400 mm
Jul	33.6 °C	+2.4 °C	452 mm	-212 mm
Aug	32.3 °C	+0.9 °C	495 mm	-59 mm
Sep	33.4 °C	+2.5 °C	350 mm	-70 mm
Oct	31.6 °C	+1.6 °C	229 mm	+63 mm
Nov	29.6 °C	+1.4 °C	77 mm	+62 mm
Dec	25.5 °C	-0.2 °C	0 mm	-5 mm

The year's extremes

Hottest day

37.7 °C

10 Jun 2025

Coldest day

10.9 °C

11 Jan 2025

Wettest day

113.4 mm

20 May 2025

Windiest day

29.6 km/h

29 May 2025

Strongest gust

61.9 km/h

30 May 2025

Hottest feels-like

46.5 °C

10 Jun 2025

Coldest feels-like

10.0 °C

11 Jan 2025

Sunniest day

13.0 h

9 Jun 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Koch Bihār?

Koch Bihār has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 24.3 °C and it receives 3,454 mm of precipitation per year.

What is the hottest day ever recorded in Koch Bihār?

The hottest day measured in Koch Bihār between 1940 and 2025 was 21 April 1957, reaching 43.6 °C.

What is the coldest day in Koch Bihār?

The coldest day measured in Koch Bihār between 1940 and 2025 was 28 January 1964, at 6.0 °C.

Does it snow in Koch Bihār?

Almost never: Koch Bihār sees virtually no snow, with about 0 frost days per year.

Has the climate of Koch Bihār warmed?

Yes: Koch Bihār warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Koch Bihār?

The wettest day measured in Koch Bihār between 1940 and 2025 was 12 August 2017, with 286 mm of rain in 24 hours.

What was the windiest day in Koch Bihār?

The windiest day measured in Koch Bihār between 1940 and 2025 was 28 May 1989, with winds reaching 45.6 km/h.

What is the warmest month in Koch Bihār?

The warmest month in Koch Bihār is August (28.2 °C on average); the coldest is January (17.3 °C).

How much does it rain in Koch Bihār?

Koch Bihār receives on average 3,454 mm of precipitation per year, spread over about 188 rainy days.

Is it sunny in Koch Bihār?

Koch Bihār gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.

Are there tropical nights in Koch Bihār?

Yes: Koch Bihār has on average 215 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Koch Bihār?

In Koch Bihār, between 1940 and 2025, the highest apparent temperature reached 47.8 °C on 7 June 1964, and the lowest was 2.6 °C on 31 January 1964.

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