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Monthly climate in Mission Viejo, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Mission Viejo features a cold semi-arid climate (BSk).Temperatures typically range between 14 °C (57 °F) and 22 °C (71 °F) through the year, but rarely can drop to 7 °C (45 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 319 mm (12.6 inches) and receives 35 rainy days on the 1 mm (0.04 inches) threshold annually.Mission Viejo enjoys an average of 3584 hours of sunshine throughout the year, and daylight varies from 9 hours 57 minutes to 14 hours 19 minutes per day.

Monthly average temperatures in Mission Viejo, California, United States §

The warmest months in Mission Viejo are July, August and September, with daily mean temperatures ranging from 21 to 22 °C (70 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 14 to 14 °C (57 - 58 °F) throughout the day. On average each year, Mission Viejo experiences 33 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 Mission Viejo, California, United States.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 27°C
(81°F)		 27°C
(80°F)		 24°C
(76°F)		 31°C
(88°F)		 25°C
(78°F)		 29°C
(85°F)		 33°C
(91°F)		 30°C
(86°F)		 33°C
(91°F)		 36°C
(97°F)		 30°C
(85°F)		 26°C
(78°F)
Mean maximum 24°C
(76°F)		 23°C
(73°F)		 23°C
(73°F)		 26°C
(80°F)		 24°C
(75°F)		 25°C
(77°F)		 28°C
(83°F)		 28°C
(82°F)		 29°C
(85°F)		 31°C
(88°F)		 28°C
(83°F)		 23°C
(74°F)
Average high 18°C
(64°F)		 17°C
(63°F)		 17°C
(63°F)		 19°C
(66°F)		 19°C
(66°F)		 21°C
(69°F)		 23°C
(75°F)		 24°C
(76°F)		 24°C
(75°F)		 23°C
(74°F)		 21°C
(70°F)		 18°C
(64°F)
Daily mean 14°C
(58°F)		 14°C
(57°F)		 14°C
(58°F)		 16°C
(61°F)		 16°C
(62°F)		 18°C
(65°F)		 21°C
(70°F)		 22°C
(71°F)		 21°C
(70°F)		 20°C
(68°F)		 17°C
(63°F)		 14°C
(58°F)
Average low 11°C
(53°F)		 11°C
(52°F)		 12°C
(53°F)		 13°C
(57°F)		 15°C
(59°F)		 16°C
(62°F)		 19°C
(66°F)		 20°C
(68°F)		 19°C
(66°F)		 17°C
(63°F)		 14°C
(58°F)		 12°C
(53°F)
Mean minimum 8°C
(47°F)		 8°C
(46°F)		 9°C
(48°F)		 11°C
(53°F)		 12°C
(54°F)		 15°C
(59°F)		 17°C
(63°F)		 18°C
(64°F)		 16°C
(62°F)		 14°C
(57°F)		 11°C
(52°F)		 9°C
(48°F)
Minimum 8°C
(46°F)		 7°C
(45°F)		 7°C
(45°F)		 11°C
(52°F)		 11°C
(52°F)		 14°C
(57°F)		 17°C
(62°F)		 16°C
(62°F)		 15°C
(59°F)		 12°C
(53°F)		 9°C
(48°F)		 7°C
(46°F)

Compare climate in Mission Viejo with other places

Compare temperature, precipitation, sunshine, UV index in Mission Viejo, California, United States with other places around the world.

Monthly average precipitation in Mission Viejo, California, United States §

Mission Viejo usually has the most precipitation in January, February and December, with an average of 5 rainy days and 61 mm (2.4 inches) of precipitation per month.The driest months in Mission Viejo are July, August and September. On average, 3 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Mission Viejo, California, United States.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) 60 (2.3) 55 (2.2) 54 (2.1) 25 (1.0) 14 (0.5) 3 (0.1) 3 (0.1) 3 (0.1) 3 (0.1) 9 (0.4) 22 (0.8) 69 (2.7)
Average precipitation days (≥ 1 mm) 5 5 10 2 4 0 0 0 0 2 2 5

Monthly sunshine hours in Mission Viejo, California, United States §

The sunniest months in Mission Viejo are June, July and August, when the sun shines an average of 12 hours 3 minutes a day.Least sunny months in Mission Viejo: January, February and December receive an average of 7 hours 7 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Mission Viejo, California, United States.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 188 236 289 318 353 369 379 361 316 293 255 223
Mean daily daylight hours 10h 12m 10h 59m 12h 0m 13h 2m 13h 54m 14h 19m 14h 5m 13h 19m 12h 19m 11h 18m 10h 24m 9h 57m

Solar UV radiation in Mission Viejo, California, United States §

Mission Viejo experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Mission Viejo UV Index data.

Average daily maximum UV levels by month for Mission Viejo, California, United States.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) 4 6 8 10 11 11 11 10 10 7 5 4