Big Arm Weather Forecast

    • 45
    • 68

    Increasing Clouds

    • 49
    • 68

    Mostly Cloudy

    • 46
    • 70

    Mostly Cloudy

    • 36
    • 52

    Chance Rain/Snow

    • 30
    • 42

    Mostly Cloudy

    • 32
    • 44

    Partly Sunny

Today 7 Oct Flathead/Mission Valleys

Partly cloudy. Highs in the upper 60s to mid 70s.

Tonight 7 Oct Flathead/Mission Valleys

Mostly clear. Lows in the 30s to lower 40s.

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  • Temperature Real-Time

Big Arm Temperature Statistics

October Temperature

Kalispell, Glacier Park International Airport (34.8 miles)

  • Lowest 3 October, 2026

    33.7 °F

  • Average October

    50.4 °F

  • Highest 5 October, 2026

    73.9 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (34.8 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    57 °F
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