Simi Valley, California Weather:
Thursday, September 3, 2026
Cloudy Weather
Day 97°
Night 63°
Precipitation 3 %
Wind 4 mph
UV Index (0 - 11+) 8
Weather Forecast History
Last Year's Weather on This Day (September 3, 2025)
Night

Day

93°

Night

64°

Wind

6 mph

Precipitation

0 %