Polson Bay Weather Forecast

    • 47
    • 76

    Decreasing Clouds

    • 49
    • 80

    Partly Sunny

    • 41
    • 76

    Chance Rain

    • 37
    • 60

    Partly Sunny

    • 40
    • 62

    Mostly Cloudy

    • 40
    • 61

    Partly Sunny

    • 40
    • 63

    Partly Sunny

Today 23 Sep Flathead/Mission Valleys

Partly cloudy. Highs in the upper 50s to mid 60s.

Tonight 23 Sep Flathead/Mission Valleys

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Polson Bay Temperature Statistics

September Temperature

Kalispell, Glacier Park International Airport (41.6 miles)

  • Lowest 17 September, 2026

    38.6 °F

  • Average September

    56.9 °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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