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Monthly climate in Sirajganj, Bangladesh

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Sirajganj features a tropical savanna climate (Aw). Temperatures typically range between 18 °C (64 °F) and 30 °C (86 °F) through the year, but rarely can drop to 8 °C (46 °F) or can rise to as high as 37 °C (99 °F). The average annual precipitation amounts to about 2040 mm (80.3 inches) and receives 172 rainy days on the 1 mm (0.04 inches) threshold annually. Sirajganj enjoys an average of 3438 hours of sunshine throughout the year, and daylight varies from 10 hours 38 minutes to 13 hours 36 minutes per day.

Monthly average temperatures in Sirajganj, Bangladesh

The warmest months in Sirajganj are July, August and September, with daily mean temperatures ranging from 29 to 30 °C (85 - 86 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 18 to 20 °C (64 - 69 °F) throughout the day. On average each year, Sirajganj experiences 291 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 Sirajganj. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum29°C
(84°F)		33°C
(91°F)		35°C
(95°F)		37°C
(99°F)		37°C
(98°F)		36°C
(97°F)		37°C
(99°F)		36°C
(97°F)		36°C
(98°F)		36°C
(97°F)		32°C
(90°F)		29°C
(85°F)
Mean maximum28°C
(82°F)		31°C
(88°F)		34°C
(94°F)		36°C
(96°F)		35°C
(96°F)		35°C
(96°F)		35°C
(96°F)		35°C
(96°F)		36°C
(96°F)		35°C
(95°F)		31°C
(89°F)		28°C
(84°F)
Average high24°C
(75°F)		27°C
(81°F)		31°C
(88°F)		32°C
(90°F)		32°C
(90°F)		32°C
(91°F)		32°C
(90°F)		33°C
(91°F)		33°C
(91°F)		32°C
(89°F)		29°C
(85°F)		25°C
(77°F)
Daily mean18°C
(64°F)		20°C
(69°F)		25°C
(77°F)		27°C
(81°F)		28°C
(83°F)		29°C
(85°F)		29°C
(85°F)		30°C
(86°F)		29°C
(85°F)		28°C
(82°F)		23°C
(75°F)		19°C
(67°F)
Average low13°C
(56°F)		15°C
(60°F)		20°C
(68°F)		23°C
(74°F)		25°C
(77°F)		27°C
(80°F)		27°C
(81°F)		27°C
(82°F)		27°C
(81°F)		25°C
(77°F)		19°C
(67°F)		15°C
(60°F)
Mean minimum10°C
(49°F)		11°C
(52°F)		16°C
(61°F)		19°C
(67°F)		22°C
(71°F)		25°C
(77°F)		26°C
(79°F)		26°C
(80°F)		26°C
(78°F)		21°C
(71°F)		16°C
(60°F)		11°C
(53°F)
Minimum8°C
(46°F)		8°C
(47°F)		13°C
(56°F)		18°C
(65°F)		21°C
(69°F)		23°C
(75°F)		25°C
(78°F)		26°C
(79°F)		25°C
(76°F)		20°C
(69°F)		15°C
(59°F)		9°C
(49°F)

Compare climate in Sirajganj with other places

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

Monthly average precipitation in Sirajganj, Bangladesh

Sirajganj usually has the most precipitation in May, June and July, with an average of 26 rainy days and 364 mm (14.3 inches) of precipitation per month. The driest months in Sirajganj are January, February and November. On average, 10 mm (0.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sirajganj. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)4 (0.1)14 (0.6)35 (1.4)207 (8.1)346 (13.6)389 (15.3)358 (14.1)261 (10.3)223 (8.8)175 (6.9)11 (0.4)19 (0.7)
Average precipitation days (≥ 1 mm)1271625262827251311

Monthly sunshine hours in Sirajganj, Bangladesh

The sunniest months in Sirajganj are March, April and May, when the sun shines an average of 10 hours 14 minutes a day. Least sunny months in Sirajganj: January, July and September receive an average of 8 hours 26 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sirajganj. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours236282329310301287262288278289289280
Mean daily daylight hours10h 47m11h 19m12h 0m12h 43m13h 19m13h 36m13h 27m12h 56m12h 15m11h 33m10h 56m10h 38m

Solar UV radiation in Sirajganj, Bangladesh

Sirajganj experiences the highest level of ultraviolet (UV) radiation in July, August and September, when the maximum UV index can reach values of 12 - 13, which corresponds to the Extreme category of sun exposure. January, February and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 7. For more detailed information, check out our hourly Sirajganj UV Index data.

Average daily maximum UV levels by month for Sirajganj. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)5791012121313121086