Simi Valley Forecast Summary
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Data captured from a Peet Bros. Ultimeter 2100
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Simi Valley Forecast
Sunday, July 13, 2025
![]() Night and morning low clouds and patchy fog will affect the coasts and most valleys into next week. Maximum temperatures will be slightly warmer today and Monday but remain below normal, except for the far interior valleys. A cooling trend will develop Tuesday and continue through the middle of next week when valley highs are only expected to be in the 80's. Today: Sunny and warm. Afternoon breezes , high near 81°F . Pollen level is rated "low". Predicted air quality is moderate, AQI: 52 (for Simi Valley and Moorpark (courtesy of the VCAPCD)). Tonight: Increasing clouds. Evening breezes, low around 57°F. Monday: Low clouds, patchy drizzle and fog early, becoming sunny and warm. Afternoon breezes, high of about 83°F. Monday night:Partly cloudy. Evening breezes, low near 57°F. Tuesday: Sunny. Light breezes, high around 79°F. Tuesday night: Clear, low of about 55°F. Wednesday: Sunny, high near 78°F. Wednesday night: Clear, low around 54°F. Thursday: Sunny and warm, high of about 80°F. Thursday night: Clear, low near 56°F. Friday: Sunny and warm, high around 82°F. Friday night: Clear, low of about 57°F. Saturday: Sunny and warm, high near 84°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
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