Big Arm State Park Weather Forecast

    • 43
    • 61

    Mostly Cloudy

    • 42
    • 61

    Partly Sunny

    • 46
    • 62

    Partly Sunny

    • 45
    • 61

    Rain Likely

    • 36
    • 51

    Chance Rain

    • 36
    • 50

    Chance Rain/Snow

Today 19 Oct Flathead/Mission Valleys

Partly cloudy. Highs in the upper 50s to mid 60s.

Tonight 19 Oct Flathead/Mission Valleys

Mostly cloudy. Lows in the 30s.

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Big Arm State Park Temperature Statistics

October Temperature

Kalispell, Glacier Park International Airport (33.6 miles)

  • Lowest 13 October, 2026

    21.7 °F

  • Average October

    46.9 °F

  • Highest 5 October, 2026

    74.6 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (33.6 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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