Lake Siskiyou Weather Forecast

    • 54
    • 88

    Areas Smoke

    • 55
    • 88

    Mostly Sunny

    • 58
    • 90

    Sunny

    • 59
    • 93

    Partly Sunny

    • 59
    • 91

    Mostly Sunny

    • 58
    • 90

    Partly Sunny

Today 30 Aug South Central Siskiyou County

Sunny. Highs in the lower 80s to lower 90s. East Winds around 5 Mph shifting to the south this afternoon.

Tonight 30 Aug South Central Siskiyou County

Mostly clear. Areas of smoke. Lows in the mid 40s to mid 50s. South Winds 5 to 10 Mph shifting to the northwest in the late evening and early Morning, then shifting to the north well after midnight.

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Lake Siskiyou Temperature Statistics

August Temperature

Mount Shasta (2.5 miles)

  • Lowest 19 August, 2025

    42.7 °F

  • Average August

    70 °F

  • Highest 11 August, 2025

    99.6 °F

Climate (2020–Present)

Mount Shasta (2.5 miles)

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  • Average Low 2020–2025

    39.5 °F

  • Average 2020–2025

    52.5 °F

  • Average High 2020–2025

    65.7 °F
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