Castle Lake Weather Forecast

    • 60
    • 76

    Sunny

    • 57
    • 78

    Slight Chance Thunderstorms

    • 54
    • 70

    Sunny

    • 55
    • 72

    Mostly Sunny

    • 59
    • 76

    Sunny

    • 60
    • 80

    Sunny

    • 60
    • 80

    Sunny

Today 6 Jul South Central Siskiyou County

Sunny. Highs in the mid 80s to mid 90s. Northeast Winds around 5 Mph shifting to the south late this afternoon.

Tonight 6 Jul South Central Siskiyou County

Clear. Lows in the lower 50s to lower 60s. Southwest Winds around 5 Mph shifting to the north after midnight.

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Castle Lake Temperature Statistics

July Temperature

Mount Shasta (6.8 miles)

  • Lowest 4 July, 2025

    48.9 °F

  • Average July

    67.6 °F

  • Highest 1 July, 2025

    84.9 °F

Climate (2020–Present)

Mount Shasta (6.8 miles)

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  • Average Low 2020–2025

    39.6 °F

  • Average 2020–2025

    52.5 °F

  • Average High 2020–2025

    65.7 °F
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