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Monthly climate in Costa Rica, San Martín, Peru

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Costa Rica features a tropical rainforest climate (Af).Temperatures typically range between 24 °C (75 °F) and 26 °C (79 °F) through the year, but rarely can drop to 15 °C (60 °F) or can rise to as high as 37 °C (98 °F).The average annual precipitation amounts to about 1877 mm (73.9 inches) and receives 218 rainy days on the 1 mm (0.04 inches) threshold annually.Costa Rica enjoys an average of 3296 hours of sunshine throughout the year, and daylight varies from 11 hours 42 minutes to 12 hours 31 minutes per day.

Monthly average temperatures in Costa Rica, San Martín, Peru §

The warmest months in Costa Rica are September, October and November, with daily mean temperatures ranging from 25 to 26 °C (78 - 79 °F) throughout the day. The coldest temperatures usually occur in May, June and July, when daily mean temperatures range from 24 to 25 °C (75 - 76 °F) throughout the day. On average each year, Costa Rica experiences 318 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 Costa Rica, San Martín, Peru.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 34°C
(94°F)		 34°C
(94°F)		 34°C
(93°F)		 33°C
(92°F)		 33°C
(92°F)		 32°C
(90°F)		 32°C
(90°F)		 35°C
(95°F)		 36°C
(97°F)		 37°C
(98°F)		 35°C
(96°F)		 33°C
(93°F)
Mean maximum 33°C
(92°F)		 33°C
(92°F)		 33°C
(92°F)		 33°C
(91°F)		 32°C
(90°F)		 31°C
(89°F)		 32°C
(89°F)		 34°C
(93°F)		 35°C
(95°F)		 35°C
(95°F)		 34°C
(93°F)		 33°C
(91°F)
Average high 29°C
(85°F)		 30°C
(86°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(86°F)		 29°C
(85°F)		 29°C
(84°F)		 30°C
(87°F)		 32°C
(89°F)		 31°C
(89°F)		 30°C
(87°F)		 30°C
(86°F)
Daily mean 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(76°F)		 24°C
(76°F)		 24°C
(75°F)		 25°C
(77°F)		 26°C
(79°F)		 26°C
(79°F)		 25°C
(78°F)		 25°C
(78°F)
Average low 21°C
(70°F)		 21°C
(71°F)		 21°C
(71°F)		 21°C
(70°F)		 20°C
(69°F)		 20°C
(67°F)		 19°C
(66°F)		 20°C
(68°F)		 21°C
(70°F)		 22°C
(71°F)		 21°C
(71°F)		 21°C
(71°F)
Mean minimum 20°C
(68°F)		 20°C
(68°F)		 20°C
(67°F)		 19°C
(67°F)		 18°C
(65°F)		 18°C
(64°F)		 17°C
(62°F)		 17°C
(62°F)		 19°C
(66°F)		 20°C
(68°F)		 20°C
(68°F)		 20°C
(68°F)
Minimum 19°C
(66°F)		 19°C
(67°F)		 18°C
(65°F)		 19°C
(66°F)		 16°C
(62°F)		 16°C
(61°F)		 15°C
(60°F)		 16°C
(61°F)		 18°C
(64°F)		 19°C
(67°F)		 19°C
(66°F)		 19°C
(67°F)

Compare climate in Costa Rica with other places

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

Monthly average precipitation in Costa Rica, San Martín, Peru §

Costa Rica usually has the most precipitation in March, November and December, with an average of 25 rainy days and 236 mm (9.3 inches) of precipitation per month.The driest months in Costa Rica are July, August and September. On average, 59 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Costa Rica, San Martín, Peru.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 217 (8.5) 212 (8.4) 242 (9.5) 174 (6.9) 148 (5.8) 94 (3.7) 62 (2.5) 61 (2.4) 53 (2.1) 146 (5.7) 247 (9.7) 220 (8.7)
Average precipitation days (≥ 1 mm) 22 22 27 23 17 11 9 7 10 20 24 26

Monthly sunshine hours in Costa Rica, San Martín, Peru §

The sunniest months in Costa Rica are July, August and September, when the sun shines an average of 10 hours 6 minutes a day.Least sunny months in Costa Rica: January, February and March receive an average of 7 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Costa Rica, San Martín, Peru.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 209 244 242 260 297 285 315 316 297 284 249 291
Mean daily daylight hours 12h 28m 12h 18m 12h 7m 11h 55m 11h 46m 11h 42m 11h 44m 11h 52m 12h 3m 12h 15m 12h 25m 12h 31m

Solar UV radiation in Costa Rica, San Martín, Peru §

Costa Rica experiences the highest level of ultraviolet (UV) radiation in February, March and April, when the maximum UV index can reach values of 16 - 16, which corresponds to the Extreme category of sun exposure.June, July and August 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 Costa Rica UV Index data.

Average daily maximum UV levels by month for Costa Rica, San Martín, Peru.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 15 16 16 16 14 11 11 12 14 15 14 14