Castaic Lagoon Weather Forecast

    • 68
    • 106

    Hot

    • 65
    • 97

    Hot

    • 62
    • 89

    Sunny

    • 59
    • 85

    Sunny

    • 58
    • 86

    Mostly Sunny

    • 56
    • 83

    Mostly Sunny

    • 58
    • 85

    Mostly Sunny

Today 10 Sep Santa Clarita Valley

Sunny. Highs 101 to 106.

Tonight 10 Sep Santa Clarita Valley

Clear. Lows in the mid 60s to lower 70s.

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Castaic Lagoon Temperature Statistics

September Temperature

Van Nuys, Van Nuys Airport (21.1 miles)

  • Lowest 2 September, 2026

    60.7 °F

  • Average September

    74.8 °F

  • Highest 7 September, 2026

    92.6 °F

Climate (2021–2026)

Van Nuys, Van Nuys Airport (21.1 miles)

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  • Average Low 2021–2026

    56.6 °F

  • Average 2021–2026

    67.7 °F

  • Average High 2021–2026

    79.5 °F
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