nomadseason

Monthly climate in Belen, Costa Rica

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Belen features a tropical savanna climate (Aw). Temperatures typically range between 26 °C (79 °F) and 29 °C (85 °F) through the year, but rarely can drop to 17 °C (63 °F) or can rise to as high as 39 °C (102 °F). The average annual precipitation amounts to about 1725 mm (67.9 inches) and receives 153 rainy days on the 1 mm (0.04 inches) threshold annually. Belen enjoys an average of 3499 hours of sunshine throughout the year, and daylight varies from 11 hours 30 minutes to 12 hours 42 minutes per day.

Monthly average temperatures in Belen, Costa Rica

The warmest months in Belen are March, April and May, with daily mean temperatures ranging from 28 to 29 °C (82 - 85 °F) throughout the day. The coldest temperatures usually occur in September, October and November, when daily mean temperatures range from 26 to 26 °C (79 - 79 °F) throughout the day. On average each year, Belen 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 Belen. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum35°C
(95°F)		36°C
(97°F)		37°C
(99°F)		39°C
(102°F)		38°C
(100°F)		36°C
(97°F)		35°C
(96°F)		36°C
(96°F)		34°C
(93°F)		33°C
(92°F)		33°C
(92°F)		34°C
(93°F)
Mean maximum34°C
(93°F)		35°C
(95°F)		36°C
(97°F)		37°C
(99°F)		37°C
(98°F)		34°C
(93°F)		34°C
(93°F)		34°C
(94°F)		33°C
(92°F)		33°C
(91°F)		32°C
(91°F)		33°C
(91°F)
Average high31°C
(89°F)		33°C
(91°F)		33°C
(93°F)		35°C
(95°F)		33°C
(91°F)		31°C
(89°F)		31°C
(89°F)		32°C
(89°F)		31°C
(88°F)		30°C
(86°F)		31°C
(87°F)		31°C
(88°F)
Daily mean27°C
(81°F)		28°C
(82°F)		28°C
(83°F)		29°C
(85°F)		28°C
(82°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		27°C
(80°F)
Average low23°C
(74°F)		23°C
(74°F)		24°C
(76°F)		24°C
(76°F)		24°C
(76°F)		24°C
(75°F)		24°C
(75°F)		24°C
(75°F)		23°C
(74°F)		23°C
(73°F)		23°C
(73°F)		23°C
(74°F)
Mean minimum20°C
(69°F)		21°C
(69°F)		22°C
(72°F)		22°C
(72°F)		23°C
(73°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		22°C
(71°F)		21°C
(70°F)		21°C
(70°F)
Minimum17°C
(63°F)		19°C
(66°F)		21°C
(70°F)		21°C
(71°F)		22°C
(73°F)		22°C
(72°F)		22°C
(72°F)		22°C
(71°F)		21°C
(71°F)		21°C
(70°F)		20°C
(67°F)		20°C
(69°F)

Compare climate in Belen with other places

Compare temperature, precipitation, sunshine, UV index in Belen, Costa Rica with other places around the world.

Monthly average precipitation in Belen, Costa Rica

Belen usually has the most precipitation in June, September and October, with an average of 25 rainy days and 313 mm (12.3 inches) of precipitation per month. The driest months in Belen are January, February and March. On average, 2 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Belen. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)5 (0.2)1 (0.0)1 (0.0)35 (1.4)255 (10.1)289 (11.4)115 (4.5)224 (8.8)277 (10.9)374 (14.7)138 (5.4)12 (0.5)
Average precipitation days (≥ 1 mm)0006202417212726111

Monthly sunshine hours in Belen, Costa Rica

The sunniest months in Belen are March, April and December, when the sun shines an average of 10 hours 39 minutes a day. Least sunny months in Belen: January, September and October receive an average of 8 hours 24 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Belen. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours261299334324277282311278267244295321
Mean daily daylight hours11h 34m11h 47m12h 3m12h 21m12h 35m12h 42m12h 38m12h 26m12h 9m11h 52m11h 37m11h 30m

Solar UV radiation in Belen, Costa Rica

Belen experiences the highest level of ultraviolet (UV) radiation in March, April and May, when the maximum UV index can reach values of 14 - 14, which corresponds to the Extreme category of sun exposure. January, November and December are in the Very High / Extreme exposure category. In these months, the maximum values of the UV index do not exceed 11. For more detailed information, check out our hourly Belen UV Index data.

Average daily maximum UV levels by month for Belen. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)111314141414141313131110