Currently 64°F in Simi Valley, California, USA
64°F
64°F / 60°F
2 mph SW
0.00"
Monday, September 21, 2026 5:36 AM PDT

Seven Day Forecast for Simi Valley, California

Posted Sunday, September 20, 2026, 3:56 PM
Warning Today's forecast is coming soon

A weak upper level trough will move over the areas today into Monday, cooling temperatures slightly and increasing the marine layer stratus. A warming trend will begin Tuesday and peak on Thursday, with highs five to ten degrees above normal.

Variably cloudy, Breezy
Today:
80°F 
58°F 
Low clouds early, becoming mostly sunny. Afternoon breezes
0% chance of precipitation
Predicted Air Quality: moderate, AQI: 66 (for Simi Valley and Moorpark (courtesy of the VCAPCD)).
Pollen level is rated "medium".
Monday night / Tuesday morning:
57°F  Partly cloudy. Light breezes
0% chance of precipitation
Sunny
Tuesday:
83°F  Sunny and warm. Light breezes
0% chance of precipitation
Tuesday night / Wednesday morning:
60°F  Clear. Light breezes
0% chance of precipitation
Sunny
Wednesday:
90°F  Sunny and very warm
0% chance of precipitation
Wednesday night / Thursday morning:
65°F  Mostly clear
0% chance of precipitation
Sunny
Thursday:
90°F  Sunny and very warm
0% chance of precipitation
Thursday night / Friday morning:
65°F  Mostly clear
0% chance of precipitation
Sunny
Friday:
88°F  Sunny and warm
0% chance of precipitation
Friday night / Saturday morning:
64°F  Mostly clear
0% chance of precipitation
Sunny
Saturday:
86°F  Sunny and warm
0% chance of precipitation
Saturday night / Sunday morning:
N/A 
% chance of precipitation
Not Available
Sunday:
N/A 
% chance of precipitation

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