Big Arm Weather Forecast

    • 50
    • 73

    Increasing Clouds

    • 51
    • 76

    Partly Sunny

    • 51
    • 79

    Partly Sunny

    • 46
    • 63

    Chance Rain

    • 48
    • 66

    Chance Rain

    • 51
    • 72

    Chance Rain

Today 23 May Flathead/Mission Valleys

Partly cloudy. Highs in the 70s. Southwest Winds to 15 Mph.

Tonight 23 May Flathead/Mission Valleys

Partly cloudy. Lows in the 40s to lower 50s.

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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

    51.4 °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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