Dayton Weather Forecast

    • 52
    • 73

    Mostly Sunny

    • 52
    • 74

    Becoming Sunny

    • 54
    • 76

    Mostly Sunny

    • 54
    • 76

    Partly Sunny

    • 52
    • 74

    Partly Sunny

    • 52
    • 70

    Partly Sunny

    • 50
    • 69

    Mostly Cloudy

Today 19 Sep Flathead/Mission Valleys

Mostly cloudy with a 20 percent chance of rain. Highs in the upper 50s to mid 60s.

Tonight 19 Sep Flathead/Mission Valleys

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

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Dayton Temperature Statistics

September Temperature

Kalispell, Glacier Park International Airport (29.8 miles)

  • Lowest 17 September, 2026

    37.9 °F

  • Average September

    56.7 °F

  • Highest 1 September, 2026

    84.7 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (29.8 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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