Big Arm State Park Weather Forecast

    • 20
    • 25

    Increasing Clouds

    • 23
    • 30

    Mostly Cloudy

    • 25
    • 33

    Mostly Cloudy

    • 27
    • 36

    Mostly Cloudy

    • 30
    • 37

    Mostly Cloudy

    • 30
    • 39

    Chance Rain/Snow

Today 28 Dec Flathead/Mission Valleys

Partly cloudy. Highs in the 20s.

Tonight 28 Dec Flathead/Mission Valleys

Partly cloudy. Lows 10 to 17.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Arm State Park Temperature Statistics

December Temperature

Kalispell, Glacier Park International Airport (33.6 miles)

  • Lowest 1 December, 2025

    19.4 °F

  • Average December

    35.2 °F

  • Highest 15 December, 2025

    53.6 °F

Climate (2020–Present)

Kalispell, Glacier Park International Airport (33.6 miles)

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  • Average Low 2020–2025

    33.3 °F

  • Average 2020–2025

    45.4 °F

  • Average High 2020–2025

    57 °F
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