Simi Valley, CA Weather & Climate Normals
Simi Valley's real weather, in one number
Simi Valley, CA scores 76/100 on this site's reading of NOAA's own 30-year normals: mild with real seasons. A solid stretch of comfortable months alongside a noticeable but not extreme summer or winter. 9 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Simi Valley's hottest and coldest months
Simi Valley's hottest month is Aug, averaging 79°F; its coldest is Dec, averaging 56°F, a 23.6°F swing across the year, a middling gap by national standards.
Simi Valley's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 70°F | 43°F | 3.73in | 0in |
| Feb | 70°F | 44°F | 4.62in | 0in |
| Mar | 74°F | 46°F | 2.66in | 0in |
| Apr | 78°F | 48°F | 0.8in | 0in |
| May | 82°F | 53°F | 0.36in | 0in |
| Jun | 89°F | 57°F | 0.06in | 0in |
| Jul | 95°F | 61°F | 0.04in | 0in |
| Aug | 97°F | 61°F | 0in | 0in |
| Sep | 94°F | 59°F | 0.09in | 0in |
| Oct | 85°F | 53°F | 0.56in | 0in |
| Nov | 76°F | 46°F | 0.83in | 0in |
| Dec | 69°F | 42°F | 2.66in | 0in |
most of the year (9 of 12 months) are the best time to see Simi Valley at its mildest; the rest of the year, plan around Aug's heat.
Rain and snow in Simi Valley
Simi Valley averages 16.41in of precipitation a year across roughly 35 days with measurable rain or snow, and 0in of snow a year.
Where Simi Valley ranks
Simi Valley ranks 190 of 4876 US cities in this dataset for comfort score, and 190 of 429 within CA. About 125,778 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Woodland Hills Pierce College, CA US, 11.5 miles from Simi Valley, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station