nomadseason

Monthly climate in San Diego, Cartago, Costa Rica

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification San Diego 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.San Diego 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 San Diego, Cartago, Costa Rica §

The warmest months in San Diego 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, San Diego 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 San Diego, Cartago, 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 24°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 maximum 23°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 high 21°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 mean 17°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 low 14°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 minimum 12°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)
Minimum 11°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 San Diego with other places

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

Monthly average precipitation in San Diego, Cartago, Costa Rica §

San Diego 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 San Diego 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 San Diego, Cartago, 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) 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) 11 12 14 23 29 28 28 28 29 29 24 16

Monthly sunshine hours in San Diego, Cartago, Costa Rica §

The sunniest months in San Diego are February, March and April, when the sun shines an average of 10 hours 19 minutes a day.Least sunny months in San Diego: 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 San Diego, Cartago, 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 245 297 329 302 248 244 228 236 249 233 247 288
Mean daily daylight hours 11h 36m 11h 47m 12h 3m 12h 20m 12h 34m 12h 41m 12h 37m 12h 25m 12h 9m 11h 52m 11h 39m 11h 32m

Solar UV radiation in San Diego, Cartago, Costa Rica §

San Diego 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 San Diego UV Index data.

Average daily maximum UV levels by month for San Diego, Cartago, 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 16 14 14 14 14 14 15 12 11