Castaic Weather Forecast

    • 51
    • 78

    Partly Sunny

    • 53
    • 82

    Mostly Sunny

    • 53
    • 85

    Mostly Sunny

    • 52
    • 84

    Mostly Sunny

    • 52
    • 81

    Mostly Sunny

    • 54
    • 85

    Mostly Sunny

Today 13 May Santa Clarita Valley

Areas of low Clouds and fog. Highs in the mid 70s. Southwest wind around 15 Mph this afternoon.

Tonight 13 May Santa Clarita Valley

Mostly clear. Lows around 50.

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Castaic Temperature Statistics

May Temperature

Van Nuys, Van Nuys Airport (20.5 miles)

  • Lowest 6 May, 2026

    50.6 °F

  • Average May

    67.2 °F

  • Highest 11 May, 2026

    91 °F

Climate (2021–Present)

Van Nuys, Van Nuys Airport (20.5 miles)

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  • Average Low 2021–2026

    56.6 °F

  • Average 2021–2026

    67.6 °F

  • Average High 2021–2026

    79.6 °F
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