Big Arm Weather Forecast

    • 48
    • 72

    Decreasing Clouds

    • 49
    • 78

    Partly Sunny

    • 41
    • 63

    Rain

    • 33
    • 51

    Chance Rain/Snow

    • 32
    • 49

    Slight Chance Snow

    • 34
    • 51

    Partly Sunny

    • 37
    • 55

    Partly Sunny

Today 20 Apr Flathead/Mission Valleys

Partly cloudy then becoming sunny in the late morning and early afternoon then becoming partly cloudy. Highs in the 70s.

Tonight 20 Apr Flathead/Mission Valleys

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

Graph Plots Open in Graphs

  • 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

    43.1 °F

  • Highest 6 April, 2026

    67.6 °F

Climate (2021–Present)

Kalispell, Glacier Park International Airport (34.8 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    57.1 °F
Get WillyWeather+ to remove ads