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Simi Valley Forecast Summary
Currently in Simi Valley
Temperature, Humidity, Wind & Pressure
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Data captured from a Peet Bros. Ultimeter 2100
Local Weather Roundup
Simi Valley Forecast
Sunday, April 19, 2026
Expect cooler conditions west of the mountains today as onshore flow returns. A low pressure system moving into California will lead to cooler and breezier conditions Monday through the middle of the week. There's a slight chance of precipitation Tuesday afternoon into Wednesday morning. Cool weather and breezy onshore flow are predicted to persist into next weekend. Today: Sunny. Warm and breezy , high near 81°F . Pollen level is rated "medium-high". Predicted air quality is moderate, AQI: 75 (for Simi Valley and Moorpark (courtesy of the VCAPCD)). Tonight: Mostly clear and cool. Evening breezes, low around 47°F. Monday: Sunny. Afternoon breezes, high of about 76°F. Monday night:Increasing clouds. Cool. Evening breezes, low near 47°F. Tuesday: Mostly cloudy and breezy. 50 percent chance of showers in the morning, then an 80 percent chance of rain in the afternoon, high around 67°F. Tuesday night: Partly cloudy and cool, low of about 45°F. Wednesday: Mostly sunny, high near 70°F. Wednesday night: Mostly clear and cool, low around 48°F. Thursday: Sunny, high of about 74°F. Thursday night: Partly cloudy and cool, low near 51°F. Friday: Mostly sunny, high around 74°F. Friday night: Partly cloudy, low of about 51°F. Saturday: Partly sunny, high near 71°F. Simi Valley forecast updated daily. Based on data from the National Weather Service, San Diego office and from WeatherCurrents.Recently in
Simi Valley
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Simi Valley
Featured Photos
Cloud Stream: As seen near the Santa Susana pass, from the 118 freeway. Photo courtesy of Gabe Medrano.
Simi Valley
Weather News
Overnight showers possible as low pressure brings first rains in over a month
Cloudy skies and a deep marine layer loomed over Southern California on Tue ... Posted March 31, 2026, 10:34 PMOther Weather Information
National Weather Service
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