Big Arm State Park Weather Forecast

    • 59
    • 84

    Smoke

    • 57
    • 84

    Mostly Sunny

    • 58
    • 83

    Mostly Sunny

    • 55
    • 81

    Partly Sunny

    • 53
    • 76

    Chance Rain Showers

    • 54
    • 76

    Mostly Sunny

Today 9 Aug Flathead/Mission Valleys

Mostly sunny. Smoke. Highs in the 80s to lower 90s.

Tonight 9 Aug Flathead/Mission Valleys

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

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Big Arm State Park Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (33.6 miles)

  • Lowest 5 August, 2026

    38.6 °F

  • Average August

    62.4 °F

  • Highest 1 August, 2026

    93.7 °F

Climate (2021–2026)

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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