Castle Lake Weather Forecast

    • 40
    • 51

    Mostly Sunny

    • 36
    • 49

    Partly Sunny

    • 38
    • 47

    Partly Sunny

    • 34
    • 44

    Rain

    • 28
    • 39

    Chance Snow

    • 28
    • 35

    Chance Snow

Today 5 Feb South Central Siskiyou County

Sunny. Highs in the mid 50s to mid 60s. East Winds 5 to 10 Mph shifting to the south this afternoon.

Tonight 5 Feb South Central Siskiyou County

Mostly clear. Lows in the lower 30s to lower 40s. East Winds 5 to 10 Mph.

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  • Temperature Real-Time

Castle Lake Temperature Statistics

February Temperature

Mount Shasta (6.8 miles)

  • Lowest 3 February, 2026

    27 °F

  • Average February

    41.3 °F

  • Highest 3 February, 2026

    59 °F

Climate (2021–Present)

Mount Shasta (6.8 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    65.7 °F
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