Big Arm Weather Forecast

    • 55
    • 75

    Rain Showers Likely

    • 57
    • 78

    Chance Rain

    • 56
    • 83

    Chance Thunderstorms

    • 51
    • 77

    Rain Showers Likely

    • 47
    • 65

    Rain Showers Likely

    • 47
    • 69

    Slight Chance Rain

Today 26 May Flathead/Mission Valleys

Rain Showers likely and a chance of Thunderstorms in the afternoon. Chance of precipitation 60 percent. Highs in the mid 70s to lower 80s.

Tonight 26 May Flathead/Mission Valleys

Rain Showers likely and a slight chance of Thunderstorms in the Evening, then a chance of rain after midnight. Chance of precipitation 70 percent. Lows in the upper 40s to mid 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

    51.6 °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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