Simi Valley, California Weather:
Tuesday, September 1, 2026
Sunny Weather
Day 84°
Night 55°
Precipitation 3 %
Wind 7 mph
UV Index (0 - 11+) 8
Weather Forecast History
Last Year's Weather on This Day (September 1, 2025)
Cloudy Night

Day

93°

Night

70°

Wind

5 mph

Precipitation

1 %