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Monthly climate in Siraha, Nepal

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Siraha features a humid subtropical climate (Cwa). Temperatures typically range between 15 °C (60 °F) and 30 °C (87 °F) through the year, but rarely can drop to 5 °C (41 °F) or can rise to as high as 41 °C (106 °F). The average annual precipitation amounts to about 1372 mm (54.0 inches) and receives 133 rainy days on the 1 mm (0.04 inches) threshold annually. Siraha enjoys an average of 3488 hours of sunshine throughout the year, and daylight varies from 10 hours 28 minutes to 13 hours 46 minutes per day.

Monthly average temperatures in Siraha, Nepal

The warmest months in Siraha are May, June and August, with daily mean temperatures ranging from 29 to 30 °C (85 - 87 °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 - 66 °F) throughout the day. On average each year, Siraha experiences 279 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 Siraha. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum29°C
(84°F)		32°C
(89°F)		38°C
(100°F)		41°C
(106°F)		41°C
(106°F)		40°C
(104°F)		38°C
(101°F)		37°C
(99°F)		36°C
(97°F)		36°C
(97°F)		34°C
(94°F)		30°C
(87°F)
Mean maximum26°C
(80°F)		30°C
(87°F)		36°C
(98°F)		39°C
(103°F)		39°C
(103°F)		38°C
(101°F)		36°C
(97°F)		36°C
(97°F)		36°C
(96°F)		35°C
(95°F)		32°C
(91°F)		29°C
(84°F)
Average high22°C
(73°F)		26°C
(79°F)		32°C
(90°F)		35°C
(96°F)		35°C
(95°F)		34°C
(94°F)		32°C
(90°F)		32°C
(90°F)		32°C
(90°F)		32°C
(89°F)		29°C
(85°F)		25°C
(77°F)
Daily mean15°C
(60°F)		19°C
(66°F)		25°C
(77°F)		29°C
(84°F)		30°C
(86°F)		30°C
(87°F)		29°C
(85°F)		29°C
(85°F)		29°C
(84°F)		26°C
(80°F)		22°C
(71°F)		17°C
(63°F)
Average low10°C
(51°F)		13°C
(56°F)		18°C
(65°F)		23°C
(74°F)		25°C
(78°F)		27°C
(80°F)		27°C
(80°F)		27°C
(80°F)		26°C
(79°F)		22°C
(72°F)		16°C
(61°F)		12°C
(53°F)
Mean minimum6°C
(44°F)		9°C
(48°F)		13°C
(55°F)		20°C
(68°F)		22°C
(72°F)		25°C
(77°F)		24°C
(76°F)		25°C
(78°F)		24°C
(76°F)		17°C
(63°F)		12°C
(55°F)		7°C
(45°F)
Minimum5°C
(41°F)		6°C
(43°F)		10°C
(49°F)		17°C
(64°F)		21°C
(70°F)		24°C
(75°F)		23°C
(74°F)		25°C
(77°F)		22°C
(73°F)		16°C
(61°F)		11°C
(52°F)		5°C
(41°F)

Compare climate in Siraha with other places

Compare temperature, precipitation, sunshine, UV index in Siraha, Nepal with other places around the world.

Monthly average precipitation in Siraha, Nepal

Siraha usually has the most precipitation in July, August and September, with an average of 25 rainy days and 315 mm (12.4 inches) of precipitation per month. The driest months in Siraha are January, November and December. On average, 5 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Siraha. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)7 (0.3)14 (0.5)14 (0.6)36 (1.4)98 (3.9)173 (6.8)445 (17.5)274 (10.8)224 (8.8)78 (3.1)0 (0.0)8 (0.3)
Average precipitation days (≥ 1 mm)11381422282722700

Monthly sunshine hours in Siraha, Nepal

The sunniest months in Siraha are March, April and May, when the sun shines an average of 11 hours 3 minutes a day. Least sunny months in Siraha: January, July and August receive an average of 7 hours 52 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Siraha. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours239277331337348316235257269305287281
Mean daily daylight hours10h 39m11h 14m12h 0m12h 47m13h 26m13h 46m13h 36m13h 1m12h 16m11h 30m10h 49m10h 28m

Solar UV radiation in Siraha, Nepal

Siraha 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 6. For more detailed information, check out our hourly Siraha UV Index data.

Average daily maximum UV levels by month for Siraha. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)568101012131212975