Simi Valley Weather Forecast

    • 57
    • 69

    Rain

    • 49
    • 71

    Chance Rain

    • 55
    • 73

    Mostly Sunny

    • 53
    • 75

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 52
    • 72

    Mostly Sunny

Today 31 Oct Southeastern Ventura County Valleys

A chance of rain in the Morning, then rain likely in the afternoon. Highs in the mid to upper 60s. Chance of precipitation 60 percent.

Tonight 31 Oct Southeastern Ventura County Valleys

Rain. Lows in the mid 50s.

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Simi Valley Temperature Statistics

October Temperature

Van Nuys, Van Nuys Airport (14.9 miles)

  • Lowest 13 October, 2026

    50.6 °F

  • Average October

    75 °F

  • Highest 3 October, 2026

    103.6 °F

Climate (2021–2026)

Van Nuys, Van Nuys Airport (14.9 miles)

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  • Average Low 2021–2026

    56.7 °F

  • Average 2021–2026

    67.9 °F

  • Average High 2021–2026

    79.7 °F
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