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Monthly climate in Siwa, Indonesia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Siwa features a tropical rainforest climate (Af). Temperatures typically range between 27 °C (81 °F) and 29 °C (84 °F) through the year, but rarely can drop to 24 °C (75 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 2148 mm (84.6 inches) and receives 264 rainy days on the 1 mm (0.04 inches) threshold annually. Siwa enjoys an average of 3358 hours of sunshine throughout the year, and daylight varies from 11 hours 54 minutes to 12 hours 19 minutes per day.

Monthly average temperatures in Siwa, Indonesia

The warmest months in Siwa are February, November and December, with daily mean temperatures ranging from 29 to 29 °C (84 - 84 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 27 to 27 °C (81 - 82 °F) throughout the day. On average each year, Siwa experiences 329 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 Siwa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum36°C
(97°F)		35°C
(96°F)		34°C
(93°F)		35°C
(95°F)		33°C
(91°F)		32°C
(90°F)		31°C
(87°F)		31°C
(89°F)		32°C
(90°F)		33°C
(92°F)		34°C
(94°F)		35°C
(95°F)
Mean maximum34°C
(94°F)		34°C
(94°F)		33°C
(92°F)		33°C
(91°F)		32°C
(89°F)		31°C
(88°F)		30°C
(87°F)		31°C
(88°F)		31°C
(89°F)		33°C
(91°F)		33°C
(92°F)		34°C
(94°F)
Average high32°C
(89°F)		32°C
(90°F)		31°C
(89°F)		31°C
(88°F)		30°C
(87°F)		29°C
(85°F)		29°C
(85°F)		30°C
(86°F)		30°C
(87°F)		31°C
(89°F)		32°C
(90°F)		32°C
(90°F)
Daily mean29°C
(84°F)		29°C
(84°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		27°C
(82°F)		27°C
(81°F)		27°C
(82°F)		28°C
(82°F)		29°C
(84°F)		29°C
(84°F)		29°C
(84°F)
Average low26°C
(80°F)		26°C
(80°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)		26°C
(79°F)		26°C
(80°F)		27°C
(80°F)
Mean minimum25°C
(78°F)		25°C
(78°F)		25°C
(78°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)		24°C
(76°F)		25°C
(76°F)		24°C
(76°F)		25°C
(77°F)		25°C
(78°F)		26°C
(78°F)
Minimum25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(78°F)		24°C
(76°F)		24°C
(76°F)		24°C
(75°F)		24°C
(76°F)		24°C
(75°F)		24°C
(76°F)		25°C
(77°F)		25°C
(78°F)

Compare climate in Siwa with other places

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

Monthly average precipitation in Siwa, Indonesia

Siwa usually has the most precipitation in April, May and June, with an average of 26 rainy days and 307 mm (12.1 inches) of precipitation per month. The driest months in Siwa are January, October and December. On average, 95 mm (3.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Siwa. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)100 (3.9)111 (4.4)196 (7.7)260 (10.3)322 (12.7)339 (13.4)236 (9.3)133 (5.2)132 (5.2)82 (3.2)131 (5.2)104 (4.1)
Average precipitation days (≥ 1 mm)202026262826241819182118

Monthly sunshine hours in Siwa, Indonesia

The sunniest months in Siwa are August, September and October, when the sun shines an average of 9 hours 50 minutes a day. Least sunny months in Siwa: January, February and June 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 Siwa. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours228254277276286275287304292307284281
Mean daily daylight hours12h 17m12h 12m12h 6m12h 0m11h 56m11h 54m11h 54m11h 58m12h 4m12h 10m12h 16m12h 19m

Solar UV radiation in Siwa, Indonesia

Siwa experiences the highest level of ultraviolet (UV) radiation in February, March and April, when the maximum UV index can reach values of 15 - 16, 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 14. For more detailed information, check out our hourly Siwa UV Index data.

Average daily maximum UV levels by month for Siwa. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)151616151412121415151414