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Simi Valley Forecast Summary
Currently in Simi Valley
Temperature, Humidity, Wind & Pressure
Sunrise & Sunset
Extreme Temperatures
Precipitation
Data captured from a Peet Bros. Ultimeter 2100
Local Weather Roundup
Simi Valley Forecast
Sunday, June 21, 2026
Below normal temperatures will continue through the weekend, with a deep marine layer, as well as gusty winds over the interior. A significant warming trend will start Monday and peak around Wednesday. A push of moisture midweek will bring at least a low chance of rain. Today: Sunny. Afternoon breezes , high near 79°F . Pollen level is rated "low-medium". Predicted air quality is good, AQI: 50 (for Simi Valley and Moorpark (courtesy of the VCAPCD)). Tonight: Clear. Light breezes, low around 55°F. Monday: Sunny and warm. Afternoon breezes, high of about 82°F. Monday night:Mostly clear. Light breezes, low near 57°F. Tuesday: Low clouds and fog early, becoming sunny and warm, high around 87°F. Tuesday night: Clear, low of about 58°F. Wednesday: Sunny and warm, high near 88°F. Wednesday night: Mostly clear, low around 62°F. Thursday: Sunny and warm, high of about 85°F. Thursday night: Mostly clear, low near 59°F. Friday: Sunny and warm, high around 83°F. Friday night: Mostly clear, low of about 56°F. Saturday: Sunny, high near 78°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: May 4th-5th, 2026
A low pressure system off the Central California coast brought unsettled we ... Posted May 7, 2026, 10:22 PMOther Weather Information
National Weather Service
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