Castaic Lake State Recreation Area Weather Forecast

    • 53
    • 80

    Breezy

    • 54
    • 71

    Sunny

    • 53
    • 70

    Sunny

    • 53
    • 70

    Sunny

    • 50
    • 67

    Sunny

    • 52
    • 68

    Sunny

Today 10 Dec Western San Gabriel Mountains and Highway 14 Corridor

Sunny. Highs from the mid 70s to around 80 at low Elevations to the mid 60s to lower 70s at high Elevations. Northeast Winds 20 to 30 Mph.

Tonight 10 Dec Western San Gabriel Mountains and Highway 14 Corridor

Clear. Lows in the upper 40s to mid 50s. Northeast Winds 15 to 25 Mph.

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Castaic Lake State Recreation Area Temperature Statistics

December Temperature

Sandberg (14.9 miles)

  • Lowest 4 December, 2025

    37 °F

  • Average December

    48.5 °F

  • Highest 6 December, 2025

    64.9 °F

Climate (2020–Present)

Sandberg (14.9 miles)

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  • Average Low 2020–2025

    51.4 °F

  • Average 2020–2025

    59.2 °F

  • Average High 2020–2025

    67.9 °F
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