Castle Lake Weather Forecast

    • 55
    • 72

    Sunny

    • 57
    • 73

    Mostly Sunny

    • 63
    • 74

    Partly Sunny

    • 61
    • 70

    Partly Sunny

    • 60
    • 71

    Mostly Sunny

Today 17 Jul South Central Siskiyou County

Sunny. Patchy smoke this morning. Highs in the mid 70s to mid 80s. East Winds around 5 Mph shifting to the south late this Morning, then increasing to 10 to 15 Mph this afternoon.

Tonight 17 Jul South Central Siskiyou County

Clear. Lows in the mid 40s to mid 50s. South Winds 10 to 15 Mph decreasing to around 5 Mph after midnight.

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Castle Lake Temperature Statistics

July Temperature

Mount Shasta (6.8 miles)

  • Lowest 1 July, 2026

    43.6 °F

  • Average July

    69.5 °F

  • Highest 15 July, 2026

    91.9 °F

Climate (2021–2026)

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

    65.8 °F
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