Chattogram climate

Name: Chattogram
Address: BD

Chattogram is warmest in April, with average highs of 31 °C, and coldest in January, when nights average 15 °C. July is the wettest month (566 mm) and January the driest (6.2 mm). Figures are 1991–2020 climate normals.

Across a full year Chattogram averages 2,608 mm of rain and 316 days above 25 °C.

Bangladesh · population 3,920,222 · 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 31 °C
Coldest month January 15 °C
Driest month January 6 mm
Wettest month July 566 mm
Least cloud January 17 % cloud
Hottest on record April 37 °C
Coldest on record December 9.3 °C
Warmest sea October 29 °C

What to expectChattogram through the year

Chattogram has a clear annual cycle: average daily highs run from 24 °C in January to 31 °C in April, a swing of 8.4 °C in mean temperature across the year.

Counted across a normal year, 316 days a year reach 25 °C, 85 of them reach 30 °C. The warmest reading in the 1991–2020 record is 37 °C, in April.

Rain is strongly seasonal. July averages 566 mm against 6 mm in January — 91 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Chattogram is warmest in October at 29 °C and coldest in January at 22 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	24.0 °C	6 mm	17 %
February	26.6 °C	16 mm	20 %
March	29.5 °C	54 mm	28 %
April	30.6 °C	109 mm	39 %
May	30.4 °C	299 mm	56 %
June	29.3 °C	529 mm	88 %
July	28.5 °C	566 mm	94 %
August	28.8 °C	433 mm	94 %
September	29.1 °C	341 mm	87 %
October	29.1 °C	197 mm	54 %
November	27.4 °C	47 mm	31 %
December	24.9 °C	11 mm	23 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	24.0 °C	15.3 °C	19.5 °C	30.5 °C	10.0 °C	7	0
February	26.6 °C	17.5 °C	22.0 °C	32.2 °C	11.0 °C	23	1
March	29.5 °C	21.6 °C	25.5 °C	36.1 °C	14.1 °C	31	11
April	30.6 °C	24.7 °C	27.5 °C	36.5 °C	19.8 °C	30	20
May	30.4 °C	25.7 °C	27.9 °C	36.3 °C	22.3 °C	31	19
June	29.3 °C	25.8 °C	27.3 °C	33.5 °C	24.0 °C	30	10
July	28.5 °C	25.4 °C	26.7 °C	32.6 °C	23.0 °C	31	4
August	28.8 °C	25.4 °C	26.8 °C	33.5 °C	23.8 °C	31	5
September	29.1 °C	25.2 °C	26.9 °C	33.6 °C	23.7 °C	30	7
October	29.1 °C	24.2 °C	26.4 °C	33.6 °C	19.3 °C	31	8
November	27.4 °C	20.6 °C	23.8 °C	31.5 °C	14.6 °C	28	1
December	24.9 °C	16.8 °C	20.6 °C	29.4 °C	9.3 °C	14	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	6 mm	1	11 h/day	17 %	73 %	12 km/h	21.6 °C
February	16 mm	2	11 h/day	20 %	71 %	13 km/h	22.8 °C
March	54 mm	5	12 h/day	28 %	74 %	16 km/h	26.1 °C
April	109 mm	9	13 h/day	39 %	80 %	18 km/h	28.4 °C
May	299 mm	20	13 h/day	56 %	84 %	19 km/h	29.2 °C
June	529 mm	27	13 h/day	88 %	88 %	22 km/h	29.1 °C
July	566 mm	29	13 h/day	94 %	89 %	22 km/h	28.7 °C
August	433 mm	29	13 h/day	94 %	88 %	20 km/h	28.6 °C
September	341 mm	26	12 h/day	87 %	88 %	16 km/h	29.1 °C
October	197 mm	17	12 h/day	54 %	86 %	12 km/h	29.3 °C
November	47 mm	3	11 h/day	31 %	81 %	11 km/h	27.2 °C
December	11 mm	1	11 h/day	23 %	78 %	11 km/h	23.9 °C

How Chattogram 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
Chattogram	31 °C	15 °C	2,608 mm	316
Hāthazāri · Bangladesh	31 °C	15 °C	2,622 mm	326
Bāndarban · Bangladesh	34 °C	14 °C	2,072 mm	343
Karnaphuli · Bangladesh	33 °C	14 °C	1,929 mm	326
Cox’s Bāzār · Bangladesh	31 °C	16 °C	2,645 mm	323
Comilla · Bangladesh	32 °C	12 °C	2,128 mm	333
Barishal · Bangladesh	33 °C	14 °C	1,964 mm	329

Where Chattogram ranks

Ranking	Position	Value
Best beach destinations in Asia in November	7th of 50	98/100
Best beach destinations in the world in November	12th of 50	98/100
Best beach destinations in Asia in March	20th of 50	95/100
Best beach destinations in Asia year-round	22nd of 50	80/100
Best beach destinations in Asia in December	33rd of 50	96/100
Best beach destinations in Asia in February	33rd of 50	97/100

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

QuestionsCommon questions about Chattogram’s climate

When is the best time to visit Chattogram?

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 January the driest. The month-by-month table above has the full picture.

How hot does Chattogram get?

In April, the warmest month, daily highs average 31 °C. About 85 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.

How cold does it get in winter?

Nights average 15 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Chattogram?

July, averaging 566 mm over 29 days with rain. The driest month is January with 6 mm. The year as a whole averages 2,608 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 Chattogram 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
Data point: 22.338°, 91.832° (the coordinates the reanalysis values are taken for)
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.