Big Arm Weather Forecast

    • 37
    • 58

    Partly Sunny

    • 44
    • 66

    Partly Sunny

    • 48
    • 73

    Partly Sunny

    • 49
    • 75

    Partly Sunny

    • 44
    • 63

    Rain Likely

    • 37
    • 54

    Chance Rain

Today 18 Apr Flathead/Mission Valleys

Partly cloudy. Highs in the 50s to lower 60s.

Tonight 18 Apr Flathead/Mission Valleys

Mostly clear. Lows in the upper 20s to mid 30s.

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  • Temperature Real-Time

Big Arm Temperature Statistics

April Temperature

Kalispell, Glacier Park International Airport (34.8 miles)

  • Lowest 8 April, 2026

    20.6 °F

  • Average April

    44.7 °F

  • Highest 6 April, 2026

    67.6 °F

Climate (2021–Present)

Kalispell, Glacier Park International Airport (34.8 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    57.2 °F
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