Columbia Falls Weather Forecast

    • 36
    • 54

    Increasing Clouds

    • 36
    • 60

    Mostly Cloudy

    • 40
    • 63

    Mostly Sunny

    • 44
    • 61

    Chance Rain

    • 41
    • 59

    Slight Chance Rain

    • 41
    • 60

    Mostly Cloudy

Today 26 Sep Flathead/Mission Valleys

Partly cloudy. Cooler. Highs in the 50s to lower 60s. Southwest Winds to 15 Mph.

Tonight 26 Sep Flathead/Mission Valleys

Mostly clear in the evening then becoming mostly cloudy. Lows in the 30s.

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Columbia Falls Temperature Statistics

September Temperature

Kalispell, Glacier Park International Airport (5.6 miles)

  • Lowest 24 September, 2026

    37.9 °F

  • Average September

    56.8 °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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