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Monthly climate in San Rafael, Alajuela, Costa Rica

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification San Rafael features a tropical monsoon climate (Am).Temperatures typically range between 23 °C (73 °F) and 25 °C (77 °F) through the year, but rarely can drop to 16 °C (62 °F) or can rise to as high as 32 °C (89 °F).The average annual precipitation amounts to about 3099 mm (122.0 inches) and receives 263 rainy days on the 1 mm (0.04 inches) threshold annually.San Rafael enjoys an average of 3018 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 San Rafael, Alajuela, Costa Rica §

The warmest months in San Rafael are February, March and April, with daily mean temperatures ranging from 24 to 25 °C (76 - 77 °F) throughout the day. The coldest temperatures usually occur in September, October and November, when daily mean temperatures range from 23 to 23 °C (73 - 74 °F) throughout the day. On average each year, San Rafael experiences 315 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 San Rafael, Alajuela, Costa Rica.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 31°C
(87°F)		 31°C
(88°F)		 32°C
(89°F)		 31°C
(89°F)		 30°C
(86°F)		 30°C
(86°F)		 29°C
(85°F)		 30°C
(85°F)		 29°C
(85°F)		 29°C
(84°F)		 29°C
(85°F)		 30°C
(86°F)
Mean maximum 29°C
(85°F)		 31°C
(87°F)		 31°C
(88°F)		 30°C
(87°F)		 29°C
(85°F)		 29°C
(84°F)		 29°C
(84°F)		 29°C
(84°F)		 29°C
(84°F)		 28°C
(83°F)		 28°C
(83°F)		 29°C
(84°F)
Average high 28°C
(82°F)		 29°C
(85°F)		 30°C
(86°F)		 29°C
(84°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(81°F)		 26°C
(79°F)		 27°C
(80°F)		 27°C
(81°F)
Daily mean 23°C
(74°F)		 24°C
(76°F)		 25°C
(77°F)		 24°C
(76°F)		 24°C
(75°F)		 24°C
(75°F)		 24°C
(75°F)		 23°C
(74°F)		 23°C
(74°F)		 23°C
(73°F)		 23°C
(74°F)		 23°C
(74°F)
Average low 20°C
(68°F)		 20°C
(68°F)		 21°C
(69°F)		 21°C
(70°F)		 21°C
(71°F)		 21°C
(71°F)		 21°C
(71°F)		 21°C
(70°F)		 21°C
(69°F)		 20°C
(69°F)		 21°C
(69°F)		 20°C
(69°F)
Mean minimum 18°C
(64°F)		 18°C
(64°F)		 19°C
(66°F)		 19°C
(66°F)		 20°C
(68°F)		 20°C
(68°F)		 20°C
(68°F)		 19°C
(67°F)		 19°C
(67°F)		 19°C
(66°F)		 19°C
(66°F)		 18°C
(65°F)
Minimum 17°C
(63°F)		 16°C
(62°F)		 18°C
(64°F)		 18°C
(64°F)		 19°C
(67°F)		 19°C
(66°F)		 19°C
(67°F)		 19°C
(66°F)		 18°C
(66°F)		 18°C
(66°F)		 18°C
(64°F)		 18°C
(65°F)

Compare climate in San Rafael with other places

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

Monthly average precipitation in San Rafael, Alajuela, Costa Rica §

San Rafael usually has the most precipitation in May, September and October, with an average of 29 rainy days and 504 mm (19.9 inches) of precipitation per month.The driest months in San Rafael are January, February and March. On average, 20 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Rafael, Alajuela, Costa Rica.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) 28 (1.1) 13 (0.5) 18 (0.7) 118 (4.6) 412 (16.2) 397 (15.6) 296 (11.7) 393 (15.5) 461 (18.2) 639 (25.2) 251 (9.9) 72 (2.8)
Average precipitation days (≥ 1 mm) 7 3 4 24 30 30 30 30 29 30 28 18

Monthly sunshine hours in San Rafael, Alajuela, Costa Rica §

The sunniest months in San Rafael are February, March and April, when the sun shines an average of 10 hours 16 minutes a day.Least sunny months in San Rafael: July, August and October receive an average of 6 hours 48 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Rafael, Alajuela, Costa Rica.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 249 296 328 299 235 226 209 213 229 210 229 291
Mean daily daylight hours 11h 35m 11h 47m 12h 3m 12h 20m 12h 34m 12h 41m 12h 37m 12h 25m 12h 9m 11h 52m 11h 38m 11h 32m

Solar UV radiation in San Rafael, Alajuela, Costa Rica §

San Rafael experiences the highest level of ultraviolet (UV) radiation in March, April and May, when the maximum UV index can reach values of 14 - 15, 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 12. For more detailed information, check out our hourly San Rafael UV Index data.

Average daily maximum UV levels by month for San Rafael, Alajuela, Costa Rica.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) 12 13 15 15 14 14 14 13 13 14 12 10