Castle Lake Weather Forecast

    • 49
    • 65

    Partly Sunny

    • 46
    • 64

    Mostly Sunny

    • 51
    • 70

    Sunny

    • 52
    • 75

    Sunny

    • 46
    • 70

    Sunny

    • 39
    • 59

    Mostly Sunny

    • 41
    • 52

    Sunny

Today 15 Jun South Central Siskiyou County

Sunny then becoming partly cloudy late this morning then becoming mostly cloudy. Highs in the lower 70s to lower 80s. Northeast Winds around 5 Mph shifting to the south this afternoon.

Tonight 15 Jun South Central Siskiyou County

Mostly cloudy in the evening then becoming partly cloudy. Lows in the lower 40s to lower 50s. Southwest Winds 5 to 10 Mph shifting to the northwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Castle Lake Temperature Statistics

June Temperature

Mount Shasta (6.8 miles)

  • Lowest 13 June, 2025

    45 °F

  • Average June

    68.3 °F

  • Highest 8 June, 2025

    93.7 °F

Climate (2020–Present)

Mount Shasta (6.8 miles)

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  • Average Low 2020–2025

    39.6 °F

  • Average 2020–2025

    52.6 °F

  • Average High 2020–2025

    65.7 °F
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