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Simi Valley Forecast Summary
Currently in Simi Valley
Temperature, Humidity, Wind & Pressure
Sunrise & Sunset
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Precipitation
Data captured from a Peet Bros. Ultimeter 2100
Local Weather Roundup
Simi Valley Forecast
Friday, September 4, 2026
Below normal temperatures, patchy marine layer clouds, and breezy onshore winds will continue today. Tropical Cyclone Marie, which will remain well offshore, will bring impacts to the region over the weekend into early next week. Rain is favored for Sunday focused over Los Angeles County. Increasing southerly swell will create hazardous surf conditions at the coasts. Today: Sunny and warm. Light breezes , high near 83°F . Pollen level is rated "medium-high". Predicted air quality is good, AQI: 50 (for Simi Valley and Moorpark (courtesy of the VCAPCD)). Tonight: Clear. Light breezes, low around 57°F. Saturday: Sunny and warm. Light breezes, high of about 85°F. Saturday night:Increasing clouds. Light breezes. 30 percent chance of showers after midnight, low near 62°F. Sunday: Partly sunny and warm. Light breezes. 50 percent chance of showers, high around 82°F. Sunday night: Mostly clear, low of about 62°F. Monday: Sunny and warm, high near 87°F. Monday night: Mostly clear, low around 64°F. Tuesday: Mostly sunny and warm. Slight chance of showers in the afternoon, high of about 88°F. Tuesday night: Mostly cloudy. Chance of showers, mainly after midnight, low near 66°F. Wednesday: Mostly sunny and very warm. Slight chance of showers, high around 90°F. Wednesday night: Partly cloudy, low of about 67°F. Thursday: Sunny and warm, high near 88°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
Tropical moisture associated with Hurricane Marie could bring showers this weekend
A broad upper level trough positioned over the West Coast is bringing not o ... Posted September 3, 2026, 10:30 PM
Late August heat wave made worse by high dew points
The recent stretch of exceptionally hot days across Southern California, ha ... Posted August 31, 2026, 11:57 PMOther Weather Information
National Weather Service
Other Simi Valley Weather Forecasts
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falling