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Monthly climate in Alajuelita, Costa Rica

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Alajuelita features a tropical monsoon climate (Am). Temperatures typically range between 17 °C (63 °F) and 19 °C (67 °F) through the year, but rarely can drop to 11 °C (52 °F) or can rise to as high as 26 °C (80 °F). The average annual precipitation amounts to about 2948 mm (116.1 inches) and receives 271 rainy days on the 1 mm (0.04 inches) threshold annually. Alajuelita enjoys an average of 3150 hours of sunshine throughout the year, and daylight varies from 11 hours 32 minutes to 12 hours 41 minutes per day.

Monthly average temperatures in Alajuelita, Costa Rica

The warmest months in Alajuelita are May, June and July, with daily mean temperatures ranging from 19 to 19 °C (66 - 67 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 17 to 18 °C (63 - 64 °F) throughout the day. On average each year, Alajuelita experiences 5 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 Alajuelita. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum24°C
(76°F)		25°C
(78°F)		25°C
(76°F)		26°C
(80°F)		26°C
(79°F)		26°C
(78°F)		25°C
(77°F)		26°C
(79°F)		25°C
(78°F)		25°C
(78°F)		24°C
(75°F)		24°C
(75°F)
Mean maximum23°C
(74°F)		24°C
(75°F)		24°C
(76°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		24°C
(76°F)		23°C
(74°F)		23°C
(74°F)
Average high21°C
(70°F)		22°C
(71°F)		22°C
(72°F)		23°C
(74°F)		23°C
(74°F)		23°C
(74°F)		23°C
(73°F)		23°C
(73°F)		23°C
(74°F)		22°C
(73°F)		22°C
(72°F)		21°C
(70°F)
Daily mean17°C
(63°F)		17°C
(64°F)		18°C
(64°F)		19°C
(66°F)		19°C
(67°F)		19°C
(67°F)		19°C
(66°F)		19°C
(66°F)		19°C
(66°F)		19°C
(66°F)		18°C
(65°F)		18°C
(64°F)
Average low14°C
(58°F)		14°C
(58°F)		14°C
(58°F)		16°C
(60°F)		17°C
(62°F)		17°C
(62°F)		16°C
(62°F)		16°C
(61°F)		16°C
(61°F)		16°C
(61°F)		16°C
(61°F)		15°C
(59°F)
Mean minimum12°C
(55°F)		12°C
(54°F)		13°C
(55°F)		14°C
(57°F)		15°C
(60°F)		16°C
(60°F)		15°C
(60°F)		15°C
(59°F)		15°C
(59°F)		15°C
(59°F)		14°C
(58°F)		13°C
(56°F)
Minimum11°C
(53°F)		11°C
(52°F)		11°C
(53°F)		13°C
(56°F)		14°C
(58°F)		15°C
(59°F)		15°C
(59°F)		15°C
(59°F)		14°C
(58°F)		14°C
(58°F)		14°C
(57°F)		12°C
(55°F)

Compare climate in Alajuelita with other places

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

Monthly average precipitation in Alajuelita, Costa Rica

Alajuelita usually has the most precipitation in May, September and October, with an average of 29 rainy days and 441 mm (17.3 inches) of precipitation per month. The driest months in Alajuelita are January, February and March. On average, 62 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Alajuelita. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)93 (3.7)43 (1.7)49 (1.9)113 (4.4)425 (16.7)341 (13.4)266 (10.5)304 (12.0)379 (14.9)517 (20.4)260 (10.3)156 (6.1)
Average precipitation days (≥ 1 mm)111214232928282829292416

Monthly sunshine hours in Alajuelita, Costa Rica

The sunniest months in Alajuelita are February, March and April, when the sun shines an average of 10 hours 19 minutes a day. Least sunny months in Alajuelita: July, August and October receive an average of 7 hours 30 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Alajuelita. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours245297329302248244228236249233247288
Mean daily daylight hours11h 36m11h 47m12h 3m12h 20m12h 34m12h 41m12h 37m12h 25m12h 9m11h 52m11h 39m11h 32m

Solar UV radiation in Alajuelita, Costa Rica

Alajuelita experiences the highest level of ultraviolet (UV) radiation in March, April and October, when the maximum UV index can reach values of 15 - 16, which corresponds to the Extreme category of sun exposure. January, November and December are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 12. For more detailed information, check out our hourly Alajuelita UV Index data.

Average daily maximum UV levels by month for Alajuelita. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)121415161414141414151211