Lake Siskiyou Weather Forecast

    • 37
    • 61

    Sunny

    • 35
    • 61

    Mostly Sunny

    • 34
    • 60

    Mostly Sunny

    • 35
    • 61

    Mostly Sunny

    • 35
    • 60

    Mostly Sunny

    • 33
    • 55

    Partly Sunny

Today 16 Jan South Central Siskiyou County

Sunny. Highs in the mid 50s to lower 60s. Northeast Winds 5 to 10 Mph.

Tonight 16 Jan South Central Siskiyou County

Clear. Lows in the lower 30s to lower 40s. Northeast Winds 5 to 10 Mph.

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Lake Siskiyou Temperature Statistics

January Temperature

Mount Shasta (2.5 miles)

  • Lowest 9 January, 2026

    21 °F

  • Average January

    36.7 °F

  • Highest 13 January, 2026

    52 °F

Climate (2021–Present)

Mount Shasta (2.5 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    65.6 °F
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