Castaic Junction Weather Forecast

    • 45
    • 61

    Rain Showers

    • 44
    • 67

    Mostly Sunny

    • 50
    • 75

    Sunny

    • 51
    • 78

    Sunny

    • 51
    • 81

    Sunny

    • 48
    • 78

    Mostly Sunny

Today 14 Oct Santa Clarita Valley

Showers with a chance of Thunderstorms in the Morning, then Showers likely with a slight chance of Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall. Locally heavy rainfall possible in the morning. Highs around 60. Southwest Winds 15 to 25 Mph with Gusts to 35 Mph.

Tonight 14 Oct Santa Clarita Valley

Mostly cloudy with a 20 percent chance of Showers in the Evening, becoming partly cloudy after midnight. Lows in the mid 40s. Southwest Winds 10 to 20 Mph in the evening.

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Castaic Junction Temperature Statistics

October Temperature

Van Nuys, Van Nuys Airport (16.8 miles)

  • Lowest 5 October, 2025

    55.9 °F

  • Average October

    68.2 °F

  • Highest 10 October, 2025

    91 °F

Climate (2020–Present)

Van Nuys, Van Nuys Airport (16.8 miles)

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  • Average Low 2020–2025

    56.6 °F

  • Average 2020–2025

    67.5 °F

  • Average High 2020–2025

    79.4 °F
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