Big Arm Weather Forecast

    • 59
    • 84

    Increasing Clouds

    • 60
    • 86

    Mostly Sunny

    • 63
    • 87

    Partly Sunny

    • 59
    • 84

    Chance Rain

    • 55
    • 77

    Mostly Sunny

    • 58
    • 81

    Mostly Sunny

Today 19 Aug Flathead/Mission Valleys

Partly cloudy. Highs in the 80s.

Tonight 19 Aug Flathead/Mission Valleys

Partly cloudy. Lows in the upper 40s to mid 50s.

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Big Arm Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (34.8 miles)

  • Lowest 5 August, 2026

    38.6 °F

  • Average August

    63.8 °F

  • Highest 1 August, 2026

    93.7 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (34.8 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    45.3 °F

  • Average High 2021–2026

    56.9 °F
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