Grass Lake Weather Forecast

    • 21
    • 44

    Becoming Sunny

    • 24
    • 42

    Mostly Sunny

    • 20
    • 45

    Sunny

    • 21
    • 42

    Mostly Sunny

    • 24
    • 46

    Mostly Sunny

    • 26
    • 47

    Mostly Sunny

    • 27
    • 49

    Mostly Sunny

Today 17 Jan North Central and Southeast Siskiyou County

Sunny until early afternoon then becoming mostly cloudy. Patchy fog early this morning. Highs in the lower to mid 40s. West Winds 5 to 10 Mph.

Tonight 17 Jan North Central and Southeast Siskiyou County

Partly cloudy early this evening then clearing. Lows in the lower to mid 20s. Northeast Winds 5 to 10 Mph.

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Grass Lake Temperature Statistics

January Temperature

Montague Siskiyou County Airport (17.4 miles)

  • Lowest 12 January, 2025

    19.9 °F

  • Average January

    37.6 °F

  • Highest 15 January, 2025

    52 °F

Climate (2020–Present)

Montague Siskiyou County Airport (17.4 miles)

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  • Average Low 2020–2025

    39.9 °F

  • Average 2020–2025

    54.3 °F

  • Average High 2020–2025

    69.2 °F
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