Big Arm State Park Weather Forecast

    • 55
    • 78

    Patchy Smoke

    • 56
    • 79

    Mostly Sunny

    • 59
    • 84

    Mostly Sunny

    • 60
    • 86

    Partly Sunny

    • 56
    • 83

    Mostly Sunny

    • 55
    • 80

    Mostly Sunny

Today 23 Aug Flathead/Mission Valleys

Partly cloudy. A 50 percent chance of rain Showers in the morning. Patchy smoke early in the afternoon. Highs in the mid 70s to lower 80s. Southwest Winds 15 to 20 Mph with Gusts to around 30 Mph in the afternoon.

Tonight 23 Aug Flathead/Mission Valleys

Mostly clear. Lows in the mid 40s to lower 50s. Southwest Winds to 15 Mph in the evening.

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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

    64.6 °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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