Simi Valley, California Weather:
Sunday, May 17, 2026
Cloudy Weather
Day 79°
Night 52°
Precipitation 6 %
Wind 6 mph
Weather Forecast History
Last Year's Weather on This Day (May 17, 2025)
Partly Sunny with Showers

Day

61°

Night

48°

Wind

9 mph

UV Index

3

Precipitation

84 %