Climate
Simi Valley weather by month
Average highs, lows, rain and snow for every month, from 30 years of weather records.
Average temperatures
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
Best time to visit: April, May, November, when highs are mild and rain is lightest.
Month by month
| Month | High | Low | Rain | Wet days |
|---|---|---|---|---|
| January | 70°F | 43°F | 3.7 in | 6 |
| February | 70°F | 44°F | 4.6 in | 7 |
| March | 74°F | 46°F | 2.7 in | 6 |
| April | 78°F | 48°F | 0.80 in | 2 |
| May | 82°F | 53°F | 0.40 in | 2 |
| June | 89°F | 57°F | 0.10 in | 0 |
| July | 95°F | 61°F | 0.00 in | 0 |
| August | 97°F | 61°F | 0.00 in | 0 |
| September | 94°F | 59°F | 0.10 in | 1 |
| October | 85°F | 53°F | 0.60 in | 2 |
| November | 76°F | 46°F | 0.80 in | 3 |
| December | 69°F | 42°F | 2.7 in | 6 |
NOAA U.S. Climate Normals 1991–2020, Woodland Hills Pierce College, Ca Us (11.3 mi away, 790 ft). Wet days: days with at least 0.01 in of precipitation.
Questions
What is the hottest month in Simi Valley?
August, with an average high of 97°F and low of 61°F.
What is the coldest month in Simi Valley?
December, with an average low of 42°F and high of 69°F.
When does it rain most in Simi Valley?
February is the wettest month, averaging 4.6 in of precipitation; the year totals about 16.5 inches.
What is the best time to visit Simi Valley?
For mild weather (highs between 65°F and 85°F) with the least rain, April, May, November.
Where do these numbers come from?
NOAA’s 1991–2020 U.S. Climate Normals for the Woodland Hills Pierce College weather station, 11.3 miles from downtown: 30-year averages, not a forecast.