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Monthly climate in San Juan Capistrano, Mexico

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification San Juan Capistrano features a cold semi-arid climate (BSk). Temperatures typically range between 14 °C (58 °F) and 23 °C (74 °F) through the year, but rarely can drop to -3 °C (28 °F) or can rise to as high as 38 °C (100 °F). The average annual precipitation amounts to about 451 mm (17.8 inches) and receives 83 rainy days on the 1 mm (0.04 inches) threshold annually. San Juan Capistrano enjoys an average of 3564 hours of sunshine throughout the year, and daylight varies from 10 hours 45 minutes to 13 hours 29 minutes per day.

Monthly average temperatures in San Juan Capistrano, Mexico

The warmest months in San Juan Capistrano are May, June and August, with daily mean temperatures ranging from 22 to 23 °C (72 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 14 to 16 °C (58 - 61 °F) throughout the day. On average each year, San Juan Capistrano experiences 238 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 Juan Capistrano. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum27°C
(81°F)		30°C
(87°F)		33°C
(92°F)		34°C
(94°F)		36°C
(97°F)		38°C
(100°F)		34°C
(93°F)		32°C
(90°F)		32°C
(89°F)		32°C
(89°F)		31°C
(88°F)		28°C
(83°F)
Mean maximum26°C
(78°F)		29°C
(84°F)		31°C
(88°F)		32°C
(90°F)		34°C
(94°F)		35°C
(96°F)		32°C
(89°F)		31°C
(88°F)		30°C
(87°F)		31°C
(88°F)		29°C
(84°F)		26°C
(80°F)
Average high22°C
(71°F)		24°C
(75°F)		27°C
(82°F)		29°C
(85°F)		31°C
(88°F)		30°C
(87°F)		28°C
(83°F)		29°C
(84°F)		27°C
(81°F)		27°C
(81°F)		25°C
(78°F)		22°C
(72°F)
Daily mean14°C
(58°F)		16°C
(61°F)		19°C
(66°F)		20°C
(69°F)		23°C
(73°F)		23°C
(74°F)		21°C
(71°F)		22°C
(72°F)		21°C
(70°F)		20°C
(69°F)		17°C
(64°F)		15°C
(58°F)
Average low7°C
(44°F)		8°C
(47°F)		10°C
(50°F)		11°C
(53°F)		14°C
(57°F)		17°C
(63°F)		16°C
(62°F)		16°C
(62°F)		16°C
(61°F)		14°C
(57°F)		10°C
(50°F)		7°C
(45°F)
Mean minimum3°C
(37°F)		3°C
(38°F)		7°C
(44°F)		8°C
(46°F)		10°C
(50°F)		14°C
(58°F)		14°C
(58°F)		14°C
(58°F)		14°C
(57°F)		9°C
(48°F)		5°C
(41°F)		2°C
(35°F)
Minimum-1°C
(31°F)		-0°C
(32°F)		5°C
(42°F)		5°C
(42°F)		8°C
(46°F)		12°C
(55°F)		13°C
(56°F)		13°C
(56°F)		12°C
(55°F)		8°C
(47°F)		2°C
(36°F)		-3°C
(28°F)

Compare climate in San Juan Capistrano with other places

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

Monthly average precipitation in San Juan Capistrano, Mexico

San Juan Capistrano usually has the most precipitation in July, August and September, with an average of 18 rainy days and 97 mm (3.8 inches) of precipitation per month. The driest months in San Juan Capistrano are March, April and May. On average, 5 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Juan Capistrano. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)16 (0.6)16 (0.6)4 (0.2)1 (0.0)9 (0.4)45 (1.8)128 (5.0)81 (3.2)81 (3.2)44 (1.7)14 (0.6)12 (0.5)
Average precipitation days (≥ 1 mm)2200211231815712

Monthly sunshine hours in San Juan Capistrano, Mexico

The sunniest months in San Juan Capistrano are March, April and May, when the sun shines an average of 10 hours 56 minutes a day. Least sunny months in San Juan Capistrano: January, February and September receive an average of 8 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Juan Capistrano. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours229265322331352314302314277288284280
Mean daily daylight hours10h 54m11h 23m12h 1m12h 40m13h 13m13h 29m13h 20m12h 51m12h 14m11h 35m11h 2m10h 45m

Solar UV radiation in San Juan Capistrano, Mexico

San Juan Capistrano experiences the highest level of ultraviolet (UV) radiation in April, May and August, 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 exposure category. In these months, the maximum values of the UV index do not exceed 9. For more detailed information, check out our hourly San Juan Capistrano UV Index data.

Average daily maximum UV levels by month for San Juan Capistrano. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)811131514141414131298