Castaic Lagoon Weather Forecast

    • 49
    • 77

    Mostly Sunny

    • 49
    • 77

    Mostly Sunny

    • 51
    • 75

    Mostly Sunny

    • 49
    • 72

    Mostly Sunny

    • 48
    • 70

    Partly Sunny

    • 46
    • 67

    Partly Sunny

Today 17 Jan Santa Clarita Valley

Sunny. Highs in the lower to mid 70s. Northeast Winds 20 to 30 Mph.

Tonight 17 Jan Santa Clarita Valley

Partly cloudy in the evening then mostly clear. Lows in the upper 30s and 40s except the mid 50s to around 60 in the Hills. Northeast Winds 15 to 25 Mph.

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Castaic Lagoon Temperature Statistics

January Temperature

Van Nuys, Van Nuys Airport (21.1 miles)

  • Lowest 8 January, 2026

    42.1 °F

  • Average January

    59.3 °F

  • Highest 14 January, 2026

    84 °F

Climate (2021–Present)

Van Nuys, Van Nuys Airport (21.1 miles)

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  • Average Low 2021–2026

    56.5 °F

  • Average 2021–2026

    67.4 °F

  • Average High 2021–2026

    79.3 °F
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