Kalispell Weather Forecast

    • 44
    • 58

    Rain

    • 44
    • 59

    Chance Rain

    • 44
    • 61

    Mostly Cloudy

    • 43
    • 64

    Mostly Sunny

    • 45
    • 68

    Mostly Sunny

    • 47
    • 71

    Mostly Sunny

Today 13 Sep Flathead/Mission Valleys

Rain likely in the Morning, then rain Showers likely and a slight chance of Thunderstorms in the afternoon. Chance of precipitation near 100 percent. Highs in the mid 50s to lower 60s.

Tonight 13 Sep Flathead/Mission Valleys

A chance of rain in the Evening, then rain likely after midnight. Chance of rain 80 percent. Lows in the upper 30s to mid 40s.

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  • Temperature Real-Time

Kalispell Temperature Statistics

September Temperature

Kalispell, Glacier Park International Airport (7.5 miles)

  • Lowest 1 September, 2026

    41.6 °F

  • Average September

    57.7 °F

  • Highest 1 September, 2026

    84.7 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (7.5 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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