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Monthly climate in Islampur, India

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Islampur features a humid subtropical climate (Cwa). Temperatures typically range between 15 °C (60 °F) and 32 °C (90 °F) through the year, but rarely can drop to 5 °C (41 °F) or can rise to as high as 45 °C (114 °F). The average annual precipitation amounts to about 1272 mm (50.1 inches) and receives 118 rainy days on the 1 mm (0.04 inches) threshold annually. Islampur enjoys an average of 3586 hours of sunshine throughout the year, and daylight varies from 10 hours 34 minutes to 13 hours 40 minutes per day.

Monthly average temperatures in Islampur, India

The warmest months in Islampur are April, May and June, with daily mean temperatures ranging from 30 to 32 °C (87 - 90 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 15 to 19 °C (60 - 67 °F) throughout the day. On average each year, Islampur experiences 278 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 Islampur. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum28°C
(83°F)		34°C
(93°F)		40°C
(104°F)		43°C
(110°F)		44°C
(112°F)		45°C
(114°F)		40°C
(105°F)		36°C
(98°F)		36°C
(98°F)		36°C
(96°F)		33°C
(92°F)		29°C
(85°F)
Mean maximum26°C
(80°F)		31°C
(89°F)		38°C
(101°F)		41°C
(107°F)		43°C
(109°F)		41°C
(107°F)		37°C
(99°F)		36°C
(97°F)		35°C
(96°F)		35°C
(95°F)		32°C
(90°F)		28°C
(83°F)
Average high22°C
(72°F)		26°C
(80°F)		33°C
(91°F)		38°C
(100°F)		38°C
(100°F)		37°C
(98°F)		33°C
(92°F)		33°C
(92°F)		33°C
(92°F)		32°C
(90°F)		29°C
(85°F)		24°C
(76°F)
Daily mean15°C
(60°F)		19°C
(67°F)		25°C
(77°F)		30°C
(87°F)		32°C
(90°F)		32°C
(90°F)		30°C
(86°F)		30°C
(86°F)		30°C
(85°F)		27°C
(81°F)		22°C
(72°F)		17°C
(63°F)
Average low11°C
(51°F)		13°C
(56°F)		19°C
(66°F)		24°C
(75°F)		27°C
(80°F)		28°C
(83°F)		28°C
(82°F)		27°C
(82°F)		27°C
(81°F)		23°C
(74°F)		17°C
(62°F)		12°C
(54°F)
Mean minimum6°C
(44°F)		9°C
(48°F)		14°C
(57°F)		20°C
(68°F)		23°C
(74°F)		26°C
(79°F)		26°C
(79°F)		26°C
(80°F)		25°C
(78°F)		18°C
(65°F)		12°C
(54°F)		7°C
(45°F)
Minimum5°C
(41°F)		8°C
(46°F)		11°C
(51°F)		18°C
(64°F)		22°C
(71°F)		24°C
(76°F)		25°C
(78°F)		26°C
(79°F)		24°C
(75°F)		16°C
(62°F)		11°C
(51°F)		5°C
(42°F)

Compare climate in Islampur with other places

Compare temperature, precipitation, sunshine, UV index in Islampur, India with other places around the world.

Monthly average precipitation in Islampur, India

Islampur usually has the most precipitation in July, August and September, with an average of 25 rainy days and 296 mm (11.6 inches) of precipitation per month. The driest months in Islampur are January, April and November. On average, 8 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Islampur. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)10 (0.4)19 (0.7)15 (0.6)14 (0.6)61 (2.4)185 (7.3)364 (14.3)284 (11.2)239 (9.4)66 (2.6)1 (0.0)15 (0.6)
Average precipitation days (≥ 1 mm)1234716272722801

Monthly sunshine hours in Islampur, India

The sunniest months in Islampur are March, April and May, when the sun shines an average of 11 hours 15 minutes a day. Least sunny months in Islampur: January, July and December receive an average of 8 hours 25 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Islampur. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours235284335344355325270286289298282277
Mean daily daylight hours10h 44m11h 17m12h 0m12h 45m13h 22m13h 40m13h 31m12h 58m12h 16m11h 32m10h 54m10h 34m

Solar UV radiation in Islampur, India

Islampur experiences the highest level of ultraviolet (UV) radiation in July, August and September, when the maximum UV index can reach values of 12 - 12, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Islampur UV Index data.

Average daily maximum UV levels by month for Islampur. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)5781099121212965