Grass Lake Weather Forecast

    • 30
    • 46

    Rain/Snow

    • 26
    • 40

    Snow

    • 22
    • 39

    Snow

    • 17
    • 36

    Partly Sunny

    • 21
    • 40

    Mostly Sunny

    • 25
    • 44

    Mostly Sunny

    • 27
    • 48

    Mostly Sunny

Today 24 Dec North Central and Southeast Siskiyou County

Mostly cloudy. A 30 percent chance of rain and snow early this afternoon. Snow level 5000 feet. Highs in the lower 40s to lower 50s. South Winds 10 to 15 Mph with Gusts to around 30 Mph.

Tonight 24 Dec North Central and Southeast Siskiyou County

Slight chance of rain and snow early this Evening, then rain and snow late this evening and overnight. Snow may be heavy at Times late this evening and overnight. Snow level 5000 feet. Snow accumulation of 7 to 13 Inches. Lows in the lower to mid 30s. Breezy. Southeast Winds 15 to 25 Mph. Chance of precipitation 90 percent.

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Grass Lake Temperature Statistics

December Temperature

Montague Siskiyou County Airport (17.4 miles)

  • Lowest 14 December, 2025

    21 °F

  • Average December

    38.4 °F

  • Highest 6 December, 2025

    57.9 °F

Climate (2020–Present)

Montague Siskiyou County Airport (17.4 miles)

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  • Average Low 2020–2025

    39.7 °F

  • Average 2020–2025

    54.2 °F

  • Average High 2020–2025

    68.9 °F
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