Calcutta climate — normals and trends

Q: What is the climate of Calcutta?

Calcutta has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 20.4 °C and it receives 810 mm of precipitation per year.

Q: What is the hottest day ever recorded in Calcutta?

The hottest day measured in Calcutta between 1940 and 2025 was 28 October 2019, reaching 41.5 °C.

Q: What is the coldest day in Calcutta?

The coldest day measured in Calcutta between 1940 and 2025 was 28 June 1964, at 1.4 °C.

Q: Does it snow in Calcutta?

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

Q: Has the climate of Calcutta warmed?

Yes: Calcutta warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Calcutta?

The wettest day measured in Calcutta between 1940 and 2025 was 12 December 1957, with 161 mm of rain in 24 hours.

Q: What was the windiest day in Calcutta?

The windiest day measured in Calcutta between 1940 and 2025 was 28 January 1976, with winds reaching 41.8 km/h.

Q: What is the warmest month in Calcutta?

The warmest month in Calcutta is January (23.8 °C on average); the coldest is July (15.4 °C).

Q: How much does it rain in Calcutta?

Calcutta receives on average 810 mm of precipitation per year, spread over about 109 rainy days.

Q: Is it sunny in Calcutta?

Calcutta gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.

Calcutta (South Africa) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 20.4 °C and it receives 810 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 January (23.8 °C on average) and the coldest is July (15.4 °C). Rainfall peaks in December.

Calcutta averages 0 frost days, 86 hot days (≥ 30 °C) and 109 rainy days per year.

Calcutta has warmed by +0.9 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.

The hottest day of the period reached 41.5 °C (on 28 October 2019) and the coldest 1.4 °C (on 28 June 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

CalcuttaMpumalanga

coords: -24.98°, 31.23°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthJanuaryColdest monthJulyWettest monthDecemberDriest monthJune

Mean daily temperature

20.4°C

Average daily high

26.6°C

Average daily low

15.5°C

Annual rainfall

810mm

Sunshine / day

9.5h

Mean relative humidity

69%

Average peak wind

13.5km/h

Seasonal range

8.4°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

86 d/yr

Rainy days (≥ 1 mm)

109 d/yr

Annual snowfall

0.0 cm

Average feels-like high

27.6 °C

Average feels-like low

15.6 °C

Average peak gust

30.2 km/h

Tropical nights (≥ 20 °C)

57 d/yr

Solar radiation

17.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.9 °C

since 1940

+0.1 °C per decade · r² = 0.22 · 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

41.5 °C

28 October 2019

Coldest day

1.4 °C

28 June 1964

Wettest day

161 mm

12 December 1957

Windiest day

41.8 km/h

28 January 1976

Strongest gust

81.7 km/h

13 March 1941

Hottest feels-like

45.3 °C

8 February 1984

Coldest feels-like

-1.7 °C

28 June 1964

Sunniest day

13.6 h

19 December 1941

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	38.5 °C16 September 2025	3.8 °C29 July 2025	21.1 °C	878 mm	86
2024	40.9 °C13 December 2024	5.1 °C7 July 2024	21.6 °C	620 mm	127
2023	37.3 °C16 September 2023	7.9 °C13 July 2023	20.9 °C	1,125 mm	92
2022	39.1 °C9 October 2022	4.0 °C17 June 2022	20.9 °C	842 mm	93
2021	38.1 °C23 October 2021	5.2 °C27 July 2021	20.6 °C	1,017 mm	99
2020	39.3 °C8 November 2020	3.9 °C14 June 2020	20.8 °C	885 mm	90
2019	41.5 °C28 October 2019	5.2 °C22 July 2019	21.7 °C	633 mm	126
2018	39.6 °C18 September 2018	6.9 °C7 June 2018	21.3 °C	542 mm	114
2017	37.0 °C25 October 2017	6.7 °C21 August 2017	20.6 °C	877 mm	84
2016	40.8 °C20 February 2016	5.8 °C12 August 2016	21.6 °C	561 mm	126
2015	39.6 °C8 October 2015	5.9 °C19 June 2015	22.0 °C	393 mm	150
2014	38.1 °C8 October 2014	3.8 °C11 July 2014	20.6 °C	680 mm	86
2013	39.8 °C12 October 2013	6.0 °C12 June 2013	20.1 °C	1,031 mm	68
2012	38.5 °C1 September 2012	4.2 °C8 August 2012	20.8 °C	650 mm	102
2011	40.7 °C23 October 2011	6.2 °C27 June 2011	20.6 °C	697 mm	92
2010	40.4 °C11 October 2010	5.4 °C17 June 2010	20.9 °C	897 mm	95
2009	36.2 °C13 November 2009	4.8 °C27 June 2009	20.5 °C	738 mm	90
2008	38.2 °C2 October 2008	6.6 °C15 July 2008	21.0 °C	647 mm	115
2007	37.6 °C22 September 2007	5.0 °C24 May 2007	20.6 °C	662 mm	103
2006	37.0 °C4 December 2006	5.5 °C5 June 2006	20.2 °C	979 mm	72
2005	38.6 °C12 October 2005	7.0 °C11 July 2005	21.3 °C	739 mm	122
2004	40.3 °C7 October 2004	5.2 °C12 June 2004	20.5 °C	921 mm	91
2003	38.7 °C9 December 2003	5.1 °C22 August 2003	21.3 °C	533 mm	132
2002	37.6 °C4 November 2002	5.7 °C12 July 2002	20.7 °C	465 mm	96
2001	37.8 °C11 September 2001	6.0 °C25 July 2001	20.3 °C	1,025 mm	67
2000	35.5 °C10 September 2000	4.0 °C17 July 2000	19.7 °C	1,477 mm	43
1999	35.6 °C18 November 1999	6.1 °C10 June 1999	20.2 °C	837 mm	49
1998	37.2 °C5 April 1998	7.7 °C16 July 1998	20.6 °C	1,139 mm	92
1997	37.5 °C29 September 1997	5.5 °C4 August 1997	20.0 °C	872 mm	71
1996	36.0 °C4 November 1996	4.8 °C9 July 1996	20.0 °C	961 mm	77
1995	38.3 °C12 October 1995	4.2 °C8 August 1995	20.3 °C	689 mm	86
1994	37.1 °C28 September 1994	2.0 °C13 July 1994	19.9 °C	489 mm	85
1993	37.5 °C2 December 1993	3.7 °C23 June 1993	20.5 °C	640 mm	73
1992	41.4 °C26 February 1992	4.7 °C6 July 1992	21.6 °C	598 mm	157
1991	37.0 °C3 March 1991	3.5 °C30 July 1991	20.4 °C	710 mm	105
1990	38.6 °C14 November 1990	3.4 °C2 July 1990	20.1 °C	754 mm	71
1989	38.1 °C20 December 1989	5.1 °C25 July 1989	20.3 °C	838 mm	70
1988	36.6 °C30 September 1988	4.9 °C26 June 1988	20.2 °C	922 mm	88
1987	35.9 °C20 February 1987	4.5 °C23 June 1987	20.6 °C	792 mm	104
1986	36.2 °C16 March 1986	5.5 °C21 July 1986	20.4 °C	635 mm	97
1985	35.6 °C11 September 1985	5.5 °C18 July 1985	20.3 °C	790 mm	84
1984	36.0 °C8 February 1984	4.8 °C18 June 1984	19.8 °C	1,019 mm	66
1983	40.4 °C11 January 1983	5.7 °C12 August 1983	20.8 °C	658 mm	96
1982	37.1 °C23 December 1982	3.8 °C17 June 1982	20.3 °C	509 mm	92
1981	37.2 °C5 November 1981	3.8 °C17 June 1981	19.5 °C	844 mm	61
1980	36.9 °C4 January 1980	2.9 °C12 July 1980	19.7 °C	952 mm	68
1979	38.5 °C1 October 1979	3.6 °C26 July 1979	20.1 °C	708 mm	88
1978	34.1 °C28 September 1978	4.9 °C26 June 1978	20.0 °C	1,010 mm	60
1977	37.3 °C22 January 1977	5.0 °C5 July 1977	20.4 °C	1,159 mm	80
1976	39.1 °C24 November 1976	4.9 °C17 July 1976	19.8 °C	858 mm	57
1975	36.3 °C11 January 1975	2.7 °C25 July 1975	19.6 °C	1,053 mm	58
1974	36.3 °C26 October 1974	5.8 °C9 September 1974	20.0 °C	909 mm	65
1973	37.6 °C25 January 1973	5.1 °C12 August 1973	20.1 °C	1,180 mm	94
1972	37.0 °C30 December 1972	4.7 °C30 June 1972	19.8 °C	974 mm	60
1971	37.9 °C11 January 1971	6.4 °C15 July 1971	20.1 °C	810 mm	66
1970	36.8 °C1 February 1970	6.0 °C10 June 1970	20.8 °C	622 mm	128
1969	36.6 °C9 March 1969	3.1 °C24 July 1969	20.1 °C	1,015 mm	83
1968	38.5 °C15 October 1968	3.2 °C16 June 1968	19.5 °C	789 mm	71
1967	38.4 °C8 January 1967	4.4 °C20 July 1967	19.8 °C	790 mm	63
1966	36.5 °C16 January 1966	5.3 °C23 August 1966	20.4 °C	713 mm	90
1965	37.5 °C23 December 1965	2.7 °C26 June 1965	20.2 °C	517 mm	96
1964	38.0 °C1 October 1964	1.4 °C28 June 1964	20.0 °C	812 mm	93
1963	37.3 °C21 December 1963	4.0 °C17 July 1963	20.2 °C	693 mm	95
1962	39.8 °C13 November 1962	5.0 °C13 July 1962	20.9 °C	841 mm	97
1961	37.7 °C27 October 1961	6.4 °C8 August 1961	20.5 °C	708 mm	103
1960	36.9 °C28 October 1960	4.2 °C29 July 1960	19.9 °C	778 mm	89
1959	39.3 °C31 October 1959	6.8 °C22 June 1959	20.6 °C	636 mm	103
1958	38.1 °C25 September 1958	4.6 °C17 June 1958	20.5 °C	1,082 mm	89
1957	38.5 °C17 November 1957	5.7 °C4 August 1957	20.5 °C	978 mm	81
1956	37.5 °C5 October 1956	5.0 °C30 August 1956	20.2 °C	786 mm	65
1955	36.0 °C11 November 1955	4.2 °C30 June 1955	18.8 °C	1,059 mm	29
1954	40.5 °C26 October 1954	5.8 °C23 July 1954	19.8 °C	684 mm	73
1953	40.2 °C16 October 1953	4.6 °C22 July 1953	20.3 °C	757 mm	80
1952	37.6 °C20 November 1952	6.1 °C1 August 1952	20.4 °C	860 mm	67
1951	40.2 °C25 November 1951	4.9 °C11 July 1951	20.7 °C	597 mm	109
1950	38.8 °C22 December 1950	5.5 °C7 August 1950	20.4 °C	781 mm	76
1949	35.3 °C4 September 1949	6.0 °C7 July 1949	19.5 °C	1,018 mm	49
1948	36.5 °C5 October 1948	7.0 °C5 July 1948	19.8 °C	1,060 mm	53
1947	40.4 °C30 October 1947	4.3 °C17 July 1947	19.9 °C	897 mm	61
1946	38.2 °C30 October 1946	5.0 °C17 June 1946	20.2 °C	810 mm	70
1945	36.2 °C19 October 1945	4.9 °C28 June 1945	19.8 °C	854 mm	53
1944	38.5 °C12 December 1944	6.8 °C15 May 1944	20.0 °C	904 mm	63
1943	39.0 °C10 October 1943	4.8 °C22 July 1943	19.5 °C	772 mm	47
1942	36.8 °C10 September 1942	6.3 °C26 July 1942	19.9 °C	1,065 mm	56
1941	41.1 °C11 October 1941	5.1 °C6 July 1941	21.6 °C	411 mm	159
1940	41.0 °C15 November 1940	4.4 °C10 July 1940	21.4 °C	563 mm	132

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

27.0 °C

+0.4 °C

Hot days (≥ 30 °C)

86 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

878 mm

+68 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.4 °C	+0.6 °C	232 mm	+95 mm
Feb	28.7 °C	0.0 °C	120 mm	-12 mm
Mar	29.0 °C	+0.9 °C	54 mm	-36 mm
Apr	25.9 °C	-0.7 °C	72 mm	+17 mm
May	26.0 °C	+0.8 °C	11 mm	-10 mm
Jun	24.6 °C	+1.3 °C	3 mm	-8 mm
Jul	24.1 °C	+1.0 °C	7 mm	-4 mm
Aug	27.2 °C	+2.4 °C	4 mm	-13 mm
Sep	28.2 °C	+1.3 °C	46 mm	+13 mm
Oct	27.6 °C	+0.1 °C	69 mm	+8 mm
Nov	26.2 °C	-1.9 °C	115 mm	+15 mm
Dec	27.7 °C	-0.9 °C	146 mm	+2 mm

The year's extremes

Hottest day

38.5 °C

16 Sep 2025

Coldest day

3.8 °C

29 Jul 2025

Wettest day

53.3 mm

13 Jan 2025

Windiest day

25.0 km/h

16 Sep 2025

Strongest gust

50.8 km/h

26 Feb 2025

Hottest feels-like

39.6 °C

15 Jan 2025

Coldest feels-like

1.5 °C

29 Jul 2025

Sunniest day

13.5 h

16 Dec 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 Calcutta?

Calcutta has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 20.4 °C and it receives 810 mm of precipitation per year.

What is the hottest day ever recorded in Calcutta?

The hottest day measured in Calcutta between 1940 and 2025 was 28 October 2019, reaching 41.5 °C.

What is the coldest day in Calcutta?

The coldest day measured in Calcutta between 1940 and 2025 was 28 June 1964, at 1.4 °C.

Does it snow in Calcutta?

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

Has the climate of Calcutta warmed?

Yes: Calcutta warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Calcutta?

The wettest day measured in Calcutta between 1940 and 2025 was 12 December 1957, with 161 mm of rain in 24 hours.

What was the windiest day in Calcutta?

The windiest day measured in Calcutta between 1940 and 2025 was 28 January 1976, with winds reaching 41.8 km/h.

What is the warmest month in Calcutta?

The warmest month in Calcutta is January (23.8 °C on average); the coldest is July (15.4 °C).

How much does it rain in Calcutta?

Calcutta receives on average 810 mm of precipitation per year, spread over about 109 rainy days.

Is it sunny in Calcutta?

Calcutta gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.

Are there tropical nights in Calcutta?

Yes: Calcutta has on average 57 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Calcutta?

In Calcutta, between 1940 and 2025, the highest apparent temperature reached 45.3 °C on 8 February 1984, and the lowest was -1.7 °C on 28 June 1964.

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