Steamboat Lake Weather Forecast

    • 42
    • 81

    Becoming Sunny

    • 40
    • 66

    Mostly Sunny

    • 44
    • 78

    Sunny

    • 46
    • 81

    Sunny

    • 50
    • 84

    Sunny

    • 51
    • 87

    Sunny

Today 12 Sep Central Siskiyou County

Sunny until early afternoon then becoming partly cloudy. Highs in the lower 70s to lower 80s. In the shasta Valley, east Winds around 5 Mph shifting to the north late this Morning, then increasing to southwest 15 to 25 Mph this afternoon. Elsewhere, west Winds 15 to 25 Mph.

Tonight 12 Sep Central Siskiyou County

Mostly clear. Lows in the lower to mid 40s. West Winds 10 to 20 Mph decreasing to 5 to 10 Mph after midnight.

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Steamboat Lake Temperature Statistics

September Temperature

Montague Siskiyou County Airport (5 miles)

  • Lowest 4 September, 2026

    35.7 °F

  • Average September

    59.6 °F

  • Highest 9 September, 2026

    93 °F

Climate (2021–2026)

Montague Siskiyou County Airport (5 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    54 °F

  • Average High 2021–2026

    69 °F
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