Grassy Lake Weather Forecast

    • 2
    • 39

    Breezy

    • 22
    • 33

    Mostly Sunny

    • 13
    • 37

    Partly Sunny

    • 11
    • 28

    Partly Sunny

    • 14
    • 36

    Mostly Cloudy

    • 10
    • 26

    Chance Snow

Today 19 Dec Eastern Glacier

Very windy. Sunny. Highs in the lower 40s. Temperatures falling into the lower teens in the afternoon. West Winds 20 to 40 Mph. Gusts up to 60 Mph decreasing to 50 Mph in the afternoon.

Tonight 19 Dec Eastern Glacier

Much Colder. Mostly clear. Lows 7 to 19. West Winds 10 to 20 Mph with Gusts to around 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grassy Lake Temperature Statistics

December Temperature

Cut Bank, Cut Bank Municipal Airport (30.4 miles)

  • Lowest 11 December, 2025

    0 °F

  • Average December

    29.5 °F

  • Highest 14 December, 2025

    55.9 °F

Climate (2020–Present)

Cut Bank, Cut Bank Municipal Airport (30.4 miles)

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  • Average Low 2020–2025

    31.6 °F

  • Average 2020–2025

    43.7 °F

  • Average High 2020–2025

    55.3 °F
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