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Monthly climate in Siulak, Indonesia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Siulak features a tropical rainforest climate (Af). Temperatures typically range between 21 °C (69 °F) and 22 °C (71 °F) through the year, but rarely can drop to 14 °C (57 °F) or can rise to as high as 30 °C (85 °F). The average annual precipitation amounts to about 4593 mm (180.8 inches) and receives 326 rainy days on the 1 mm (0.04 inches) threshold annually. Siulak enjoys an average of 3230 hours of sunshine throughout the year, and daylight varies from 12 hours 0 minutes to 12 hours 13 minutes per day.

Monthly average temperatures in Siulak, Indonesia

The warmest months in Siulak are April, May and June, with daily mean temperatures ranging from 21 to 22 °C (70 - 71 °F) throughout the day. The coldest temperatures usually occur in August, September and October, when daily mean temperatures range from 21 to 21 °C (69 - 70 °F) throughout the day. On average each year, Siulak experiences 213 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 Siulak. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum28°C
(83°F)		29°C
(84°F)		30°C
(85°F)		29°C
(84°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		29°C
(85°F)		29°C
(84°F)		29°C
(85°F)		29°C
(84°F)
Mean maximum28°C
(82°F)		28°C
(83°F)		29°C
(84°F)		28°C
(83°F)		28°C
(83°F)		27°C
(82°F)		28°C
(82°F)		27°C
(82°F)		28°C
(83°F)		28°C
(82°F)		28°C
(82°F)		28°C
(82°F)
Average high25°C
(77°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(78°F)		25°C
(78°F)		25°C
(78°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)
Daily mean21°C
(70°F)		21°C
(70°F)		21°C
(70°F)		21°C
(71°F)		22°C
(71°F)		21°C
(70°F)		21°C
(70°F)		21°C
(70°F)		21°C
(69°F)		21°C
(69°F)		21°C
(70°F)		21°C
(70°F)
Average low18°C
(65°F)		18°C
(65°F)		18°C
(65°F)		18°C
(65°F)		19°C
(66°F)		18°C
(65°F)		18°C
(64°F)		18°C
(64°F)		18°C
(64°F)		18°C
(64°F)		18°C
(65°F)		18°C
(65°F)
Mean minimum17°C
(63°F)		16°C
(61°F)		16°C
(62°F)		17°C
(62°F)		17°C
(63°F)		17°C
(63°F)		16°C
(60°F)		16°C
(60°F)		16°C
(60°F)		16°C
(62°F)		17°C
(62°F)		17°C
(62°F)
Minimum16°C
(61°F)		14°C
(58°F)		15°C
(59°F)		15°C
(59°F)		16°C
(62°F)		15°C
(60°F)		15°C
(59°F)		15°C
(59°F)		14°C
(57°F)		16°C
(60°F)		16°C
(60°F)		16°C
(61°F)

Compare climate in Siulak with other places

Compare temperature, precipitation, sunshine, UV index in Siulak, Indonesia with other places around the world.

Monthly average precipitation in Siulak, Indonesia

Siulak usually has the most precipitation in March, September and October, with an average of 28 rainy days and 481 mm (18.9 inches) of precipitation per month. The driest months in Siulak are January, February and July. On average, 280 mm (11.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Siulak. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)224 (8.8)321 (12.6)476 (18.7)381 (15.0)390 (15.3)389 (15.3)295 (11.6)362 (14.2)473 (18.6)493 (19.4)434 (17.1)357 (14.1)
Average precipitation days (≥ 1 mm)222629292927262728282827

Monthly sunshine hours in Siulak, Indonesia

The sunniest months in Siulak are July, August and September, when the sun shines an average of 9 hours 43 minutes a day. Least sunny months in Siulak: January, April and November receive an average of 7 hours 47 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Siulak. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours212257260256283284306303284268240270
Mean daily daylight hours12h 12m12h 9m12h 6m12h 2m12h 0m12h 0m12h 0m12h 2m12h 4m12h 8m12h 11m12h 13m

Solar UV radiation in Siulak, Indonesia

Siulak experiences the highest level of ultraviolet (UV) radiation in January, March and April, when the maximum UV index can reach values of 16 - 17, which corresponds to the Extreme category of sun exposure. June, July and November are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 15. For more detailed information, check out our hourly Siulak UV Index data.

Average daily maximum UV levels by month for Siulak. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)161617161512131515161515