Best Time to Visit Simi Valley
Best time: Jun, Jul, Aug, May.
Aug is warmest (32.1°C high); Feb is rainiest (88 mm).
See the best things to do in Simi Valley →
See the best things to do in Simi Valley →
Simi Valley weather by month
| Month | High °C | Low °C | Rain mm | Sun hrs |
|---|---|---|---|---|
| Jan | 18.9 | 5.8 | 87 | 4.5 |
| Feb | 19.2 | 6.3 | 88 | 5.5 |
| Mar | 19.9 | 6.7 | 68 | 7.8 |
| Apr | 22.5 | 7.8 | 28 | 9.9 |
| May | 24.2 | 10.1 | 5 | 10.8 |
| Jun | 27.2 | 12.4 | 1 | 11.5 |
| Jul | 31.1 | 14.5 | 0 | 11.4 |
| Aug | 32.1 | 15.2 | 2 | 10.9 |
| Sep | 30.5 | 14.2 | 6 | 8.9 |
| Oct | 27.6 | 11.6 | 8 | 6.8 |
| Nov | 22.9 | 8 | 62 | 5.2 |
| Dec | 19.6 | 5.6 | 60 | 4.3 |
Average high temperature
Best months by activity
Overall: JunJulAugMay
Beaches: JulAugJunSep
Hiking: JunMayJulOct
Sightseeing: JunJulAugMay
Simi Valley quick facts
What to pack
Mild year-round — pack layers and a light jacket.
Frequently asked questions
When is the best time to visit Simi Valley?
Jun, Jul, Aug, May.
What is the rainiest month?
Feb, about 88 mm.
What is the warmest month?
Aug, with average highs of 32.1°C.
Where to stay
See Simi Valley hotels · Book Simi Valley tours & activities
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Climate data: Open-Meteo Historical (ERA5), 1991–2020 climate normals.
Licensed under CC BY 4.0.
Open-Meteo.