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Monthly climate in Biak, Indonesia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Biak features a tropical rainforest climate (Af). Temperatures typically range between 27 °C (81 °F) and 28 °C (82 °F) through the year, but rarely can drop to 25 °C (77 °F) or can rise to as high as 30 °C (86 °F). The average annual precipitation amounts to about 3281 mm (129.2 inches) and receives 320 rainy days on the 1 mm (0.04 inches) threshold annually. Biak enjoys an average of 3279 hours of sunshine throughout the year, and daylight varies from 12 hours 2 minutes to 12 hours 10 minutes per day.

Monthly average temperatures in Biak, Indonesia

The warmest months in Biak are May, November and December, with daily mean temperatures ranging from 27 to 28 °C (82 - 82 °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 - 81 °F) throughout the day. On average each year, Biak 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 Biak. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum29°C
(85°F)		29°C
(85°F)		29°C
(85°F)		29°C
(85°F)		30°C
(86°F)		29°C
(85°F)		29°C
(84°F)		29°C
(85°F)		29°C
(85°F)		30°C
(86°F)		30°C
(86°F)		30°C
(86°F)
Mean maximum29°C
(85°F)		29°C
(85°F)		29°C
(84°F)		29°C
(84°F)		29°C
(85°F)		29°C
(84°F)		29°C
(84°F)		29°C
(84°F)		29°C
(84°F)		29°C
(85°F)		29°C
(85°F)		29°C
(85°F)
Average high28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		28°C
(82°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		29°C
(84°F)		28°C
(84°F)
Daily mean27°C
(82°F)		27°C
(81°F)		27°C
(81°F)		27°C
(82°F)		27°C
(82°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(82°F)		28°C
(82°F)		28°C
(82°F)
Average low26°C
(80°F)		26°C
(79°F)		26°C
(79°F)		26°C
(80°F)		26°C
(80°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(80°F)		26°C
(80°F)		26°C
(80°F)
Mean minimum25°C
(78°F)		25°C
(78°F)		25°C
(78°F)		25°C
(78°F)		25°C
(78°F)		26°C
(78°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)		25°C
(78°F)		26°C
(78°F)		25°C
(78°F)
Minimum25°C
(78°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		26°C
(78°F)		25°C
(77°F)

Compare climate in Biak with other places

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

Monthly average precipitation in Biak, Indonesia

Biak usually has the most precipitation in April, June and December, with an average of 28 rainy days and 349 mm (13.7 inches) of precipitation per month. The driest months in Biak are January, October and November. On average, 220 mm (8.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Biak. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)212 (8.3)247 (9.7)247 (9.7)361 (14.2)272 (10.7)393 (15.5)286 (11.2)285 (11.2)239 (9.4)219 (8.6)229 (9.0)292 (11.5)
Average precipitation days (≥ 1 mm)232429272828282725262629

Monthly sunshine hours in Biak, Indonesia

The sunniest months in Biak are July, August and October, when the sun shines an average of 9 hours 21 minutes a day. Least sunny months in Biak: January, February and December receive an average of 8 hours 16 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Biak. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours231252274269280274285293283292273269
Mean daily daylight hours12h 10m12h 8m12h 5m12h 4m12h 3m12h 2m12h 2m12h 3m12h 5m12h 7m12h 9m12h 10m

Solar UV radiation in Biak, Indonesia

Biak experiences the highest level of ultraviolet (UV) radiation in February, 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 December are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 13. For more detailed information, check out our hourly Biak UV Index data.

Average daily maximum UV levels by month for Biak. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)151617171412121415151413