Big Arm State Park Weather Forecast

    • 23
    • 32

    Decreasing Clouds

    • 14
    • 30

    Mostly Cloudy

    • 12
    • 24

    Mostly Sunny

    • 15
    • 25

    Partly Sunny

    • 18
    • 28

    Partly Sunny

    • 25
    • 32

    Mostly Cloudy

Today 21 Jan Flathead/Mission Valleys

Mostly cloudy. Highs in the mid 20s to lower 30s.

Tonight 21 Jan Flathead/Mission Valleys

Mostly cloudy. Lows 12 to 19.

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Big Arm State Park Temperature Statistics

January Temperature

Kalispell, Glacier Park International Airport (33.6 miles)

  • Lowest 17 January, 2026

    14 °F

  • Average January

    29 °F

  • Highest 12 January, 2026

    45 °F

Climate (2021–Present)

Kalispell, Glacier Park International Airport (33.6 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    45.3 °F

  • Average High 2021–2026

    57 °F
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