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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
Saturday, January 3, 2026
 Forecast not current
Another storm system will arrive Saturday, bringing rain and high elevation snow through the weekend, along with gusty winds at times. Broader troughing over the West will keep a cooler weather pattern in place through next week with cool days and cold nights. Today: Mostly cloudy and breezy. 100 percent chance of rain, heavy at times , high near 60°F . Pollen level is rated "medium". Predicted air quality is good, AQI: 44 (for Simi Valley and Moorpark (courtesy of the VCAPCD)). Tonight: Mostly cloudy. Cool and breezy. 80 percent chance of rain, low around 52°F. Sunday: Mostly cloudy and cool. Light breezes. 80 percent chance of rain, mainly in the afternoon, high of about 59°F. Sunday night:Mostly cloudy. Cool and breezy. 60 percent chance of rain, mainly in the evening. Slight chance of thunderstorms, low near 49°F. Monday: Partly sunny. 30 percent chance of showers, mainly in the afternoon, high around 60°F. Monday night: Mostly cloudy and cool. 40 percent chance of showers, low of about 48°F. Tuesday: Partly sunny and cool. Chance of showers, high near 59°F. Tuesday night: Partly cloudy and cool. Slight chance of showers, low around 46°F. Wednesday: Mostly sunny and cool. Slight chance of showers, high of about 62°F. Wednesday night: Partly cloudy and cool. Slight chance of showers, low near 43°F. Thursday: Sunny, high around 60°F. Thursday night: Mostly clear and cool, low of about 42°F. Friday: Sunny and cool, high near 60°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
Storm Totals: December 23rd-27th, 2025
Several storm systems impacted Southern California during the week of Chris ... Posted December 28, 2025, 11:18 AMOther Weather Information
National Weather Service
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