Castaic Lake Weather Forecast

    • 45
    • 76

    Increasing Clouds

    • 43
    • 66

    Rain

    • 48
    • 69

    Mostly Sunny

    • 51
    • 74

    Partly Sunny

    • 50
    • 72

    Partly Sunny

    • 49
    • 68

    Partly Sunny

Today 20 Apr Santa Clarita Valley

Sunny. Highs in the mid 70s. Southwest Winds 10 to 20 Mph in the afternoon.

Tonight 20 Apr Santa Clarita Valley

Partly cloudy. Lows in the mid 40s to around 50. Southwest Winds 10 to 20 Mph in the evening.

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Castaic Lake Temperature Statistics

April Temperature

Los Angeles, Whiteman Airport (22.4 miles)

  • Lowest 13 April, 2026

    53.6 °F

  • Average April

    69.7 °F

  • Highest 4 April, 2026

    86 °F

Climate (2021–Present)

Los Angeles, Whiteman Airport (22.4 miles)

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  • Average Low 2021–2026

    60.3 °F

  • Average 2021–2026

    70.3 °F

  • Average High 2021–2026

    76.5 °F
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