Big Arm Weather Forecast

    • 47
    • 68

    Decreasing Clouds

    • 50
    • 73

    Partly Sunny

    • 51
    • 75

    Partly Sunny

    • 48
    • 74

    Mostly Cloudy

    • 47
    • 64

    Chance Rain

    • 47
    • 65

    Chance Rain

Today 22 May Flathead/Mission Valleys

Partly cloudy. Highs in the mid 60s to lower 70s.

Tonight 22 May Flathead/Mission Valleys

Mostly cloudy with a 20 percent chance of rain in the Evening, then mostly clear after midnight. Lows in the upper 30s to mid 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Arm Temperature Statistics

May Temperature

Kalispell, Glacier Park International Airport (34.8 miles)

  • Lowest 6 May, 2026

    29.6 °F

  • Average May

    51.6 °F

  • Highest 12 May, 2026

    76.6 °F

Climate (2021–Present)

Kalispell, Glacier Park International Airport (34.8 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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