nomadseason

Monthly climate in Mersam, Indonesia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Mersam features a tropical rainforest climate (Af). Temperatures typically range between 27 °C (80 °F) and 28 °C (82 °F) through the year, but rarely can drop to 22 °C (72 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 2499 mm (98.4 inches) and receives 286 rainy days on the 1 mm (0.04 inches) threshold annually. Mersam enjoys an average of 3327 hours of sunshine throughout the year, and daylight varies from 12 hours 1 minutes to 12 hours 12 minutes per day.

Monthly average temperatures in Mersam, Indonesia

The warmest months in Mersam are May, August and September, with daily mean temperatures ranging from 28 to 28 °C (82 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 27 to 27 °C (80 - 81 °F) throughout the day. On average each year, Mersam 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 Mersam. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum33°C
(92°F)		34°C
(94°F)		35°C
(95°F)		34°C
(94°F)		35°C
(95°F)		33°C
(93°F)		34°C
(93°F)		36°C
(97°F)		36°C
(97°F)		35°C
(95°F)		34°C
(94°F)		34°C
(94°F)
Mean maximum33°C
(91°F)		33°C
(92°F)		34°C
(93°F)		34°C
(93°F)		34°C
(93°F)		33°C
(92°F)		33°C
(92°F)		34°C
(94°F)		35°C
(94°F)		34°C
(94°F)		34°C
(93°F)		34°C
(93°F)
Average high31°C
(88°F)		31°C
(88°F)		32°C
(89°F)		32°C
(90°F)		32°C
(90°F)		32°C
(89°F)		31°C
(89°F)		32°C
(90°F)		32°C
(90°F)		32°C
(90°F)		32°C
(89°F)		31°C
(88°F)
Daily mean27°C
(80°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		28°C
(82°F)		27°C
(81°F)		27°C
(81°F)		28°C
(82°F)		28°C
(82°F)		27°C
(82°F)		27°C
(81°F)		27°C
(81°F)
Average low24°C
(75°F)		24°C
(75°F)		24°C
(76°F)		24°C
(76°F)		25°C
(77°F)		24°C
(76°F)		24°C
(75°F)		24°C
(76°F)		24°C
(76°F)		24°C
(76°F)		24°C
(76°F)		24°C
(76°F)
Mean minimum23°C
(73°F)		23°C
(74°F)		23°C
(74°F)		23°C
(74°F)		24°C
(75°F)		23°C
(74°F)		22°C
(72°F)		23°C
(73°F)		23°C
(73°F)		23°C
(74°F)		23°C
(74°F)		23°C
(74°F)
Minimum22°C
(72°F)		22°C
(72°F)		23°C
(73°F)		23°C
(73°F)		23°C
(74°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		23°C
(74°F)		23°C
(74°F)

Compare climate in Mersam with other places

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

Monthly average precipitation in Mersam, Indonesia

Mersam usually has the most precipitation in March, April and November, with an average of 27 rainy days and 279 mm (11.0 inches) of precipitation per month. The driest months in Mersam are February, July and August. On average, 143 mm (5.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Mersam. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)178 (7.0)164 (6.4)282 (11.1)271 (10.7)241 (9.5)165 (6.5)131 (5.2)136 (5.4)173 (6.8)254 (10.0)284 (11.2)219 (8.6)
Average precipitation days (≥ 1 mm)212328282724191919252726

Monthly sunshine hours in Mersam, Indonesia

The sunniest months in Mersam are May, July and August, when the sun shines an average of 9 hours 48 minutes a day. Least sunny months in Mersam: January, November and December receive an average of 7 hours 57 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Mersam. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours215266286265294285310307292286255260
Mean daily daylight hours12h 11m12h 9m12h 6m12h 3m12h 1m12h 1m12h 1m12h 2m12h 5m12h 7m12h 10m12h 12m

Solar UV radiation in Mersam, Indonesia

Mersam 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. May, June and July 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 Mersam UV Index data.

Average daily maximum UV levels by month for Mersam. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)141516151312121414141414