Simi Valley Forecast Summary
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Data captured from a Peet Bros. Ultimeter 2100
Local Weather Roundup
Simi Valley Forecast
Sunday, May 4, 2025
![]() Cooler than normal temperatures are expected through Monday with drizzle or light showers at times, especially tonight into Sunday. Locally windy conditions are predicted over the weekend as well. Isolated thunderstorms are possible in the mountains each afternoon through Monday. Dry with weather a gradual warming trend will begin Tuesday. Today: Cloudy, becoming mostly sunny. Breezy. 30 percent chance of showers in the morning , high near 64°F . Pollen level is rated "low-medium". Predicted air quality is good, AQI: 42 (for Simi Valley and Moorpark (courtesy of the VCAPCD)). Tonight: Mostly cloudy. Light breezes, low around 52°F. Monday: Mostly sunny. Light breezes, high of about 66°F. Monday night:Mostly cloudy, then patchy fog developing. Light breezes, low near 51°F. Tuesday: Patchy fog early, otherwise partly sunny, high around 70°F. Tuesday night: Partly cloudy, low of about 51°F. Wednesday: Patchy fog early, otherwise mostly sunny, high near 74°F. Wednesday night: Mostly clear, low around 54°F. Thursday: Sunny and warm, high of about 81°F. Thursday night: Mostly clear, low near 56°F. Friday: Sunny and warm, high around 84°F. Friday night: Mostly cloudy, then patchy fog developing, low of about 59°F. Saturday: Patchy fog early, otherwise mostly sunny and warm, high near 85°F. Simi Valley forecast updated daily. Based on data from the National Weather Service, San Diego office and from WeatherCurrents.Recently in
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Cloud Stream: As seen near the Santa Susana pass, from the 118 freeway. Photo courtesy of Gabe Medrano.
Simi Valley
Weather News
Low pressure systems bring cool, cloudy weather late this week
Multiple weak low pressure systems brought cool, cloudy weather to the regi ... Posted April 19, 2025, 4:07 PMOther Weather Information
National Weather Service
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