Polson Bay Weather Forecast

    • 40
    • 55

    Rain Showers

    • 40
    • 66

    Rain Likely

    • 44
    • 76

    Mostly Sunny

    • 44
    • 78

    Chance Rain

    • 38
    • 68

    Chance Rain

    • 35
    • 62

    Chance Rain

Today 7 Sep Flathead/Mission Valleys

Slight chance of Thunderstorms. Rain Showers likely. Chance of precipitation near 100 percent. Cooler. Some Thunderstorms may produce heavy rainfall. Highs in the 50s.

Tonight 7 Sep Flathead/Mission Valleys

A chance of rain in the Evening, then rain likely after midnight. Chance of rain 70 percent. Lows in the upper 30s to mid 40s.

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  • Temperature Real-Time

Polson Bay Temperature Statistics

September Temperature

Kalispell, Glacier Park International Airport (41.6 miles)

  • Lowest 1 September, 2026

    41.6 °F

  • Average September

    59.1 °F

  • Highest 1 September, 2026

    84.7 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (41.6 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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