Columbia Falls Weather Forecast

    • 51
    • 75

    Increasing Clouds

    • 49
    • 73

    Partly Sunny

    • 50
    • 72

    Mostly Sunny

    • 49
    • 73

    Mostly Sunny

    • 49
    • 74

    Mostly Sunny

    • 49
    • 73

    Partly Sunny

Today 17 Sep Flathead/Mission Valleys

Mostly sunny. Highs in the 70s.

Tonight 17 Sep Flathead/Mission Valleys

Mostly cloudy with a 40 percent chance of rain. Lows in the mid 40s to lower 50s.

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Columbia Falls Temperature Statistics

September Temperature

Kalispell, Glacier Park International Airport (5.6 miles)

  • Lowest 1 September, 2026

    41.6 °F

  • Average September

    57.1 °F

  • Highest 1 September, 2026

    84.7 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (5.6 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    57 °F
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