Castle Crags State Park Weather Forecast

    • 58
    • 90

    Decreasing Clouds

    • 55
    • 92

    Mostly Sunny

    • 55
    • 89

    Mostly Sunny

    • 55
    • 87

    Mostly Sunny

    • 54
    • 87

    Partly Sunny

    • 53
    • 83

    Partly Sunny

Today 20 Sep Shasta Lake Area and Interstate 5 Between 1000-3000 ft

Partly cloudy in the morning then clearing. Highs 83 to 93. Northeast Winds up to 10 Mph in the morning becoming light.

Tonight 20 Sep Shasta Lake Area and Interstate 5 Between 1000-3000 ft

Mostly cloudy in the evening then clearing. Lows 55 to 65. Light Winds.

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Castle Crags State Park Temperature Statistics

September Temperature

Mount Shasta (10.6 miles)

  • Lowest 4 September, 2026

    33.7 °F

  • Average September

    58 °F

  • Highest 9 September, 2026

    90.6 °F

Climate (2021–2026)

Mount Shasta (10.6 miles)

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  • Average Low 2021–2026

    39.5 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    65.7 °F
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