Simi Valley Weather Forecast

    • 54
    • 80

    Mostly Sunny

    • 55
    • 82

    Mostly Sunny

    • 55
    • 82

    Mostly Sunny

    • 52
    • 77

    Partly Sunny

    • 51
    • 76

    Partly Sunny

    • 51
    • 73

    Partly Sunny

    • 53
    • 74

    Mostly Sunny

Today 31 Oct Southeastern Ventura County Valleys

Sunny except for patchy low Clouds and fog in the morning. Highs in the 70s to lower 80s.

Tonight 31 Oct Southeastern Ventura County Valleys

Clear in the evening then Areas of low Clouds and fog. Fog locally dense with visibility one quarter mile or less. Lows in the lower to mid 50s.

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Simi Valley Temperature Statistics

October Temperature

Van Nuys, Van Nuys Airport (14.9 miles)

  • Lowest 15 October, 2025

    50 °F

  • Average October

    67.4 °F

  • Highest 28 October, 2025

    93 °F

Climate (2020–Present)

Van Nuys, Van Nuys Airport (14.9 miles)

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  • Average Low 2020–2025

    56.5 °F

  • Average 2020–2025

    67.4 °F

  • Average High 2020–2025

    79.4 °F
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