Big Arm Weather Forecast

    • 45
    • 65

    Increasing Clouds

    • 49
    • 72

    Partly Sunny

    • 49
    • 76

    Mostly Cloudy

    • 41
    • 61

    Rain

    • 36
    • 52

    Chance Rain/Snow

    • 36
    • 54

    Partly Sunny

Today 19 Apr Flathead/Mission Valleys

Partly cloudy. Highs in the 60s.

Tonight 19 Apr Flathead/Mission Valleys

Partly cloudy. Lows in the mid 30s to lower 40s.

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  • Temperature Forecast NOAA

  • 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

    43.9 °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

    57.1 °F
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