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Monthly climate in Chattogram, Bangladesh

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Chattogram features a tropical monsoon climate (Am). Temperatures typically range between 20 °C (69 °F) and 29 °C (84 °F) through the year, but rarely can drop to 15 °C (59 °F) or can rise to as high as 33 °C (92 °F). The average annual precipitation amounts to about 2694 mm (106.1 inches) and receives 163 rainy days on the 1 mm (0.04 inches) threshold annually. Chattogram enjoys an average of 3526 hours of sunshine throughout the year, and daylight varies from 10 hours 46 minutes to 13 hours 27 minutes per day.

Monthly average temperatures in Chattogram, Bangladesh

The warmest months in Chattogram are May, June and September, with daily mean temperatures ranging from 28 to 29 °C (83 - 84 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 20 to 22 °C (69 - 72 °F) throughout the day. On average each year, Chattogram experiences 272 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Chattogram. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum27°C
(81°F)		28°C
(82°F)		32°C
(91°F)		33°C
(92°F)		33°C
(92°F)		31°C
(89°F)		31°C
(88°F)		31°C
(88°F)		32°C
(90°F)		32°C
(90°F)		30°C
(87°F)		28°C
(83°F)
Mean maximum25°C
(78°F)		27°C
(81°F)		30°C
(86°F)		31°C
(89°F)		32°C
(90°F)		31°C
(87°F)		31°C
(88°F)		30°C
(87°F)		31°C
(89°F)		32°C
(90°F)		30°C
(86°F)		27°C
(81°F)
Average high23°C
(74°F)		25°C
(77°F)		28°C
(82°F)		30°C
(85°F)		30°C
(87°F)		29°C
(85°F)		29°C
(84°F)		29°C
(85°F)		30°C
(85°F)		30°C
(85°F)		28°C
(83°F)		25°C
(77°F)
Daily mean20°C
(69°F)		22°C
(72°F)		26°C
(78°F)		28°C
(83°F)		29°C
(84°F)		28°C
(83°F)		28°C
(82°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		25°C
(78°F)		22°C
(71°F)
Average low18°C
(64°F)		19°C
(67°F)		23°C
(74°F)		26°C
(80°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		26°C
(80°F)		23°C
(74°F)		19°C
(67°F)
Mean minimum16°C
(61°F)		16°C
(62°F)		21°C
(69°F)		24°C
(75°F)		25°C
(77°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		25°C
(77°F)		20°C
(69°F)		17°C
(63°F)
Minimum15°C
(60°F)		15°C
(59°F)		19°C
(66°F)		22°C
(72°F)		24°C
(75°F)		26°C
(78°F)		25°C
(78°F)		26°C
(79°F)		26°C
(79°F)		23°C
(73°F)		20°C
(67°F)		16°C
(61°F)

Compare climate in Chattogram with other places

Compare temperature, precipitation, sunshine, UV index in Chattogram, Bangladesh with other places around the world.

Monthly average precipitation in Chattogram, Bangladesh

Chattogram usually has the most precipitation in June, July and August, with an average of 28 rainy days and 598 mm (23.5 inches) of precipitation per month. The driest months in Chattogram are January, February and December. On average, 11 mm (0.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Chattogram. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)6 (0.3)4 (0.1)35 (1.4)71 (2.8)139 (5.5)642 (25.3)707 (27.8)446 (17.5)326 (12.8)254 (10.0)42 (1.6)24 (0.9)
Average precipitation days (≥ 1 mm)113816273029251742

Monthly sunshine hours in Chattogram, Bangladesh

The sunniest months in Chattogram are March, April and May, when the sun shines an average of 10 hours 57 minutes a day. Least sunny months in Chattogram: January, June and July receive an average of 8 hours 32 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Chattogram. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours244290330332344269271281280294295288
Mean daily daylight hours10h 55m11h 23m12h 1m12h 39m13h 11m13h 27m13h 19m12h 51m12h 14m11h 36m11h 3m10h 46m

Solar UV radiation in Chattogram, Bangladesh

Chattogram experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 13 - 13, which corresponds to the Extreme category of sun exposure. January, February and December are in the High / Very High exposure category. In these months, the maximum values of the UV index do not exceed 8. For more detailed information, check out our hourly Chattogram UV Index data.

Average daily maximum UV levels by month for Chattogram. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)68101012131313121186