Castaic Lagoon Weather Forecast

    • 53
    • 81

    Mostly Cloudy

    • 51
    • 79

    Mostly Sunny

    • 50
    • 76

    Partly Sunny

    • 45
    • 66

    Rain

    • 46
    • 67

    Mostly Sunny

    • 47
    • 72

    Mostly Sunny

    • 48
    • 73

    Mostly Sunny

Today 18 Apr Santa Clarita Valley

Sunny. Highs in the upper 70s to mid 80s. East Winds 15 to 25 Mph.

Tonight 18 Apr Santa Clarita Valley

Partly cloudy in the evening then mostly cloudy. Lows in the lower 50s.

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  • Temperature Real-Time

Castaic Lagoon Temperature Statistics

April Temperature

Van Nuys, Van Nuys Airport (21.1 miles)

  • Lowest 14 April, 2026

    48.7 °F

  • Average April

    65.9 °F

  • Highest 4 April, 2026

    87.7 °F

Climate (2021–Present)

Van Nuys, Van Nuys Airport (21.1 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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