Big Arm State Park Weather Forecast

    • 52
    • 76

    Slight Chance Rain

    • 52
    • 72

    Slight Chance Thunderstorms

    • 54
    • 76

    Partly Sunny

    • 57
    • 81

    Partly Sunny

    • 58
    • 84

    Mostly Cloudy

    • 52
    • 72

    Chance Rain

Today 21 Jun Flathead/Mission Valleys

Mostly sunny. A 40 percent chance of Areas of rain in the afternoon. Highs in the mid 70s to lower 80s.

Tonight 21 Jun Flathead/Mission Valleys

Partly cloudy. A 20 percent chance of rain in the evening. Lows in the mid 40s to lower 50s.

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Big Arm State Park Temperature Statistics

June Temperature

Kalispell, Glacier Park International Airport (33.6 miles)

  • Lowest 14 June, 2026

    35.7 °F

  • Average June

    56.4 °F

  • Highest 16 June, 2026

    82.7 °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

    45.5 °F

  • Average High 2021–2026

    57.2 °F
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