Mission Viejo, CA Weather & Climate Normals
Mission Viejo's real weather, in one number
Mission Viejo, CA scores 93/100 on this site's reading of NOAA's own 30-year normals: very mild year-round. Many months fall in a comfortable temperature range with limited snow or seasonal extremes. 12 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Mission Viejo's hottest and coldest months
Mission Viejo's hottest month is Aug, averaging 71°F; its coldest is Dec, averaging 56°F, a 15.6°F swing across the year, one of the smaller gaps in this dataset.
Mission Viejo's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 68°F | 44°F | 2.78in | 0in |
| Feb | 68°F | 45°F | 3.39in | 0in |
| Mar | 69°F | 48°F | 1.62in | 0in |
| Apr | 73°F | 50°F | 0.8in | 0in |
| May | 75°F | 55°F | 0.2in | 0in |
| Jun | 76°F | 58°F | 0.11in | 0in |
| Jul | 80°F | 60°F | 0.11in | 0in |
| Aug | 81°F | 61°F | 0.02in | 0in |
| Sep | 81°F | 59°F | 0.16in | 0in |
| Oct | 77°F | 55°F | 0.49in | 0in |
| Nov | 72°F | 49°F | 1.13in | 0in |
| Dec | 67°F | 44°F | 1.87in | 0in |
Nothing in Mission Viejo's year falls outside this site's mild range - there's no heat or cold stretch to plan a visit around.
Rain and snow in Mission Viejo
Mission Viejo averages 12.68in of precipitation a year across roughly 31 days with measurable rain or snow, and 0in of snow a year.
Where Mission Viejo ranks
Mission Viejo ranks 44 of 4876 US cities in this dataset for comfort score, and 44 of 429 within CA. About 91,601 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Laguna Beach, CA US, 8.4 miles from Mission Viejo, not a prediction for any specific day.
More on how this is worked out
How the comfort score is calculated · Why some cities show no snow or rain figure