Big Arm Weather Forecast

    • 49
    • 78

    Increasing Clouds

    • 40
    • 60

    Rain

    • 33
    • 47

    Rain/Snow

    • 31
    • 46

    Chance Snow

    • 31
    • 49

    Partly Sunny

    • 34
    • 51

    Partly Sunny

    • 37
    • 55

    Slight Chance Rain

Today 21 Apr Flathead/Mission Valleys

Mostly sunny. Highs in the upper 70s to mid 80s.

Tonight 21 Apr Flathead/Mission Valleys

Mostly cloudy until early morning then clearing. Lows in the 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

    43.3 °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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