Castaic Weather Forecast

    • 67
    • 103

    Hot

    • 67
    • 101

    Hot

    • 67
    • 98

    Hot

    • 67
    • 98

    Hot

    • 66
    • 98

    Hot

    • 66
    • 97

    Hot

Today 19 Aug Santa Clarita Valley

Sunny. Highs 95 to 103. Southwest Winds 10 to 20 Mph in the afternoon.

Tonight 19 Aug Santa Clarita Valley

Mostly clear. Lows in the mid 60s to around 70. Southwest Winds 10 to 20 Mph in the evening.

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Castaic Temperature Statistics

August Temperature

Van Nuys, Van Nuys Airport (20.5 miles)

  • Lowest 16 August, 2026

    62.7 °F

  • Average August

    81 °F

  • Highest 8 August, 2026

    101.6 °F

Climate (2021–2026)

Van Nuys, Van Nuys Airport (20.5 miles)

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  • Average Low 2021–2026

    56.5 °F

  • Average 2021–2026

    67.6 °F

  • Average High 2021–2026

    79.5 °F
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