Kolkata climate

Name: Kolkata
Address: IN

Kolkata is warmest in April, with average highs of 35 °C, and coldest in January, when nights average 13 °C. July is the wettest month (352 mm) and December the driest (11 mm). Figures are 1991–2020 climate normals.

Across a full year Kolkata averages 1,616 mm of rain and 337 days above 25 °C.

India · population 4,631,392 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month April 35 °C
Coldest month January 13 °C
Driest month December 11 mm
Wettest month July 352 mm
Least cloud January 20 % cloud
Hottest on record April 42 °C
Coldest on record January 8.1 °C

What to expectKolkata through the year

Kolkata has a clear annual cycle: average daily highs run from 25 °C in January to 35 °C in April, a swing of 11 °C in mean temperature across the year.

Counted across a normal year, 337 days a year reach 25 °C, 214 of them reach 30 °C. The warmest reading in the 1991–2020 record is 42 °C, in April.

Rain is strongly seasonal. July averages 352 mm against 11 mm in December — 32 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	25.0 °C	13 mm	20 %
February	28.6 °C	22 mm	21 %
March	33.1 °C	28 mm	24 %
April	35.3 °C	69 mm	33 %
May	34.9 °C	125 mm	47 %
June	32.8 °C	269 mm	82 %
July	31.1 °C	352 mm	93 %
August	30.9 °C	308 mm	93 %
September	30.8 °C	252 mm	83 %
October	30.2 °C	136 mm	49 %
November	28.4 °C	30 mm	29 %
December	25.7 °C	11 mm	22 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	25.0 °C	12.9 °C	18.8 °C	30.7 °C	8.1 °C	16	0
February	28.6 °C	16.4 °C	22.5 °C	36.6 °C	9.3 °C	25	8
March	33.1 °C	21.4 °C	27.0 °C	39.0 °C	13.5 °C	31	28
April	35.3 °C	25.2 °C	29.6 °C	41.6 °C	18.1 °C	30	29
May	34.9 °C	26.8 °C	30.3 °C	41.6 °C	22.5 °C	31	30
June	32.8 °C	26.9 °C	29.4 °C	41.4 °C	23.4 °C	30	26
July	31.1 °C	26.1 °C	28.1 °C	35.9 °C	24.1 °C	31	25
August	30.9 °C	25.8 °C	27.9 °C	33.9 °C	24.2 °C	31	24
September	30.8 °C	25.3 °C	27.6 °C	34.0 °C	20.8 °C	30	22
October	30.2 °C	23.1 °C	26.4 °C	33.6 °C	17.3 °C	31	19
November	28.4 °C	18.5 °C	23.3 °C	32.7 °C	12.3 °C	29	4
December	25.7 °C	14.3 °C	19.8 °C	30.1 °C	8.8 °C	22	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	13 mm	2	11 h/day	20 %	69 %	11 km/h
February	22 mm	2	11 h/day	21 %	67 %	11 km/h
March	28 mm	4	12 h/day	24 %	65 %	13 km/h
April	69 mm	8	13 h/day	33 %	71 %	16 km/h
May	125 mm	11	13 h/day	47 %	76 %	17 km/h
June	269 mm	22	14 h/day	82 %	83 %	17 km/h
July	352 mm	29	13 h/day	93 %	86 %	16 km/h
August	308 mm	29	13 h/day	93 %	87 %	15 km/h
September	252 mm	25	12 h/day	83 %	87 %	13 km/h
October	136 mm	13	12 h/day	49 %	83 %	10.0 km/h
November	30 mm	2	11 h/day	29 %	73 %	9.8 km/h
December	11 mm	1	11 h/day	22 %	69 %	10 km/h

How Kolkata compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Kolkata	35 °C	13 °C	1,616 mm	337
Rajpur Sonarpur · India	35 °C	13 °C	1,665 mm	340
Uluberiya · India	36 °C	13 °C	1,542 mm	340
Shyamnagar · India	35 °C	13 °C	1,592 mm	335
Bhātpāra · India	36 °C	12 °C	1,613 mm	334
Naihāti · India	36 °C	12 °C	1,605 mm	334

Planning a trip? See the best time to visit Kolkata.

QuestionsCommon questions about Kolkata’s climate

When is the best time to visit Kolkata?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, February, December sit closest to 20 °C on average, April is the warmest month and December the driest. The month-by-month table above has the full picture.

How hot does Kolkata get?

In April, the warmest month, daily highs average 35 °C. About 214 days a year pass 30 °C. The highest value in the 1991–2020 record is 42 °C.

How cold does it get in winter?

Nights average 13 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Kolkata?

July, averaging 352 mm over 29 days with rain. The driest month is December with 11 mm. The year as a whole averages 1,616 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Kolkata rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.