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Monthly climate in San Diego, Mexico

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification San Diego features a subtropical climate (Cwb). Temperatures typically range between 12 °C (54 °F) and 17 °C (63 °F) through the year, but rarely can drop to 0 °C (32 °F) or can rise to as high as 28 °C (83 °F). The average annual precipitation amounts to about 2123 mm (83.6 inches) and receives 195 rainy days on the 1 mm (0.04 inches) threshold annually. San Diego enjoys an average of 3545 hours of sunshine throughout the year, and daylight varies from 10 hours 59 minutes to 13 hours 14 minutes per day.

Monthly average temperatures in San Diego, Mexico

The warmest months in San Diego are April, May and June, with daily mean temperatures ranging from 16 to 17 °C (61 - 63 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 12 to 13 °C (54 - 56 °F) throughout the day. On average each year, San Diego experiences 32 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. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum24°C
(76°F)		26°C
(79°F)		27°C
(82°F)		28°C
(83°F)		28°C
(83°F)		28°C
(82°F)		25°C
(77°F)		24°C
(76°F)		26°C
(79°F)		24°C
(76°F)		25°C
(77°F)		24°C
(75°F)
Mean maximum23°C
(74°F)		25°C
(77°F)		26°C
(80°F)		27°C
(81°F)		27°C
(81°F)		26°C
(78°F)		24°C
(76°F)		24°C
(75°F)		24°C
(76°F)		24°C
(75°F)		24°C
(75°F)		23°C
(74°F)
Average high20°C
(68°F)		22°C
(71°F)		24°C
(75°F)		24°C
(76°F)		24°C
(76°F)		22°C
(71°F)		21°C
(71°F)		21°C
(71°F)		21°C
(70°F)		21°C
(71°F)		21°C
(70°F)		20°C
(68°F)
Daily mean12°C
(54°F)		13°C
(56°F)		15°C
(60°F)		16°C
(62°F)		17°C
(63°F)		16°C
(61°F)		16°C
(60°F)		16°C
(60°F)		15°C
(60°F)		15°C
(59°F)		14°C
(57°F)		12°C
(54°F)
Average low5°C
(42°F)		6°C
(44°F)		8°C
(47°F)		9°C
(49°F)		10°C
(51°F)		12°C
(53°F)		11°C
(52°F)		11°C
(52°F)		11°C
(53°F)		10°C
(51°F)		8°C
(46°F)		6°C
(42°F)
Mean minimum2°C
(36°F)		4°C
(39°F)		6°C
(42°F)		7°C
(45°F)		8°C
(46°F)		9°C
(49°F)		9°C
(48°F)		9°C
(48°F)		9°C
(48°F)		8°C
(46°F)		4°C
(40°F)		2°C
(36°F)
Minimum-0°C
(32°F)		2°C
(36°F)		5°C
(41°F)		5°C
(41°F)		7°C
(44°F)		9°C
(49°F)		8°C
(47°F)		8°C
(47°F)		8°C
(47°F)		5°C
(42°F)		2°C
(36°F)		-0°C
(32°F)

Compare climate in San Diego with other places

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

Monthly average precipitation in San Diego, Mexico

San Diego usually has the most precipitation in June, August and September, with an average of 28 rainy days and 395 mm (15.6 inches) of precipitation per month. The driest months in San Diego are January, February and December. On average, 15 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Diego. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)15 (0.6)17 (0.7)37 (1.5)55 (2.2)200 (7.9)422 (16.6)324 (12.8)401 (15.8)362 (14.2)215 (8.5)60 (2.4)14 (0.5)
Average precipitation days (≥ 1 mm)33108202830302822103

Monthly sunshine hours in San Diego, Mexico

The sunniest months in San Diego are March, April and May, when the sun shines an average of 10 hours 38 minutes a day. Least sunny months in San Diego: January, February and September receive an average of 8 hours 51 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Diego. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours242278320322335293307294275290287296
Mean daily daylight hours11h 7m11h 31m12h 2m12h 34m13h 1m13h 14m13h 7m12h 43m12h 12m11h 40m11h 13m10h 59m

Solar UV radiation in San Diego, Mexico

San Diego experiences the highest level of ultraviolet (UV) radiation in April, May and September, 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 Very High exposure category. In these months, the maximum values of the UV index do not exceed 10. For more detailed information, check out our hourly San Diego UV Index data.

Average daily maximum UV levels by month for San Diego. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)10121515151414141512109