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Monthly climate in Mercedes, San José, Costa Rica

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Mercedes features a tropical rainforest climate (Af).Temperatures typically range between 19 °C (67 °F) and 20 °C (69 °F) through the year, but rarely can drop to 11 °C (52 °F) or can rise to as high as 28 °C (83 °F).The average annual precipitation amounts to about 4833 mm (190.3 inches) and receives 314 rainy days on the 1 mm (0.04 inches) threshold annually.Mercedes enjoys an average of 3144 hours of sunshine throughout the year, and daylight varies from 11 hours 34 minutes to 12 hours 38 minutes per day.

Monthly average temperatures in Mercedes, San José, Costa Rica §

The warmest months in Mercedes are April, May and June, with daily mean temperatures ranging from 20 to 20 °C (69 - 69 °F) throughout the day. The coldest temperatures usually occur in January, November and December, when daily mean temperatures range from 19 to 20 °C (67 - 67 °F) throughout the day. On average each year, Mercedes experiences 69 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 Mercedes, San José, 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 26°C
(80°F)		 27°C
(80°F)		 28°C
(82°F)		 27°C
(80°F)		 27°C
(81°F)		 28°C
(83°F)		 26°C
(80°F)		 27°C
(80°F)		 27°C
(80°F)		 26°C
(80°F)		 26°C
(78°F)		 26°C
(78°F)
Mean maximum 25°C
(78°F)		 26°C
(78°F)		 26°C
(80°F)		 26°C
(80°F)		 26°C
(80°F)		 26°C
(80°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 25°C
(77°F)		 25°C
(78°F)
Average high 24°C
(75°F)		 25°C
(76°F)		 25°C
(77°F)		 25°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(75°F)		 23°C
(74°F)		 24°C
(75°F)
Daily mean 19°C
(67°F)		 20°C
(68°F)		 20°C
(68°F)		 20°C
(69°F)		 20°C
(69°F)		 20°C
(69°F)		 20°C
(69°F)		 20°C
(68°F)		 20°C
(68°F)		 20°C
(68°F)		 20°C
(67°F)		 19°C
(67°F)
Average low 15°C
(60°F)		 15°C
(60°F)		 16°C
(61°F)		 17°C
(63°F)		 18°C
(64°F)		 17°C
(63°F)		 17°C
(63°F)		 17°C
(63°F)		 17°C
(63°F)		 17°C
(62°F)		 16°C
(62°F)		 16°C
(61°F)
Mean minimum 13°C
(56°F)		 13°C
(56°F)		 14°C
(57°F)		 15°C
(59°F)		 16°C
(61°F)		 16°C
(61°F)		 16°C
(61°F)		 16°C
(60°F)		 15°C
(60°F)		 14°C
(58°F)		 15°C
(58°F)		 14°C
(57°F)
Minimum 12°C
(55°F)		 11°C
(52°F)		 13°C
(56°F)		 14°C
(58°F)		 15°C
(59°F)		 15°C
(59°F)		 15°C
(60°F)		 15°C
(59°F)		 15°C
(59°F)		 12°C
(54°F)		 14°C
(57°F)		 13°C
(57°F)

Compare climate in Mercedes with other places

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

Monthly average precipitation in Mercedes, San José, Costa Rica §

Mercedes usually has the most precipitation in May, October and November, with an average of 30 rainy days and 677 mm (26.7 inches) of precipitation per month.The driest months in Mercedes are January, February and March. On average, 64 mm (2.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Mercedes, San José, 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) 89 (3.5) 44 (1.8) 57 (2.3) 251 (9.9) 609 (24.0) 568 (22.4) 477 (18.8) 589 (23.2) 536 (21.1) 802 (31.6) 620 (24.4) 191 (7.5)
Average precipitation days (≥ 1 mm) 18 15 14 28 31 30 31 31 30 30 29 27

Monthly sunshine hours in Mercedes, San José, Costa Rica §

The sunniest months in Mercedes are February, March and December, when the sun shines an average of 10 hours 18 minutes a day.Least sunny months in Mercedes: May, September and October receive an average of 7 hours 24 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Mercedes, San José, 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 253 298 333 293 230 241 249 240 231 220 247 305
Mean daily daylight hours 11h 38m 11h 49m 12h 4m 12h 19m 12h 32m 12h 38m 12h 35m 12h 23m 12h 9m 11h 53m 11h 41m 11h 34m

Solar UV radiation in Mercedes, San José, Costa Rica §

Mercedes experiences the highest level of ultraviolet (UV) radiation in March, April and May, when the maximum UV index can reach values of 15 - 15, 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 Mercedes UV Index data.

Average daily maximum UV levels by month for Mercedes, San José, 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 14 15 15 15 14 14 14 14 14 12 11