Polson Bay Weather Forecast

    • 41
    • 66

    Slight Chance Rain Showers

    • 42
    • 65

    Mostly Cloudy

    • 43
    • 71

    Partly Sunny

    • 42
    • 71

    Mostly Sunny

    • 45
    • 73

    Partly Sunny

    • 45
    • 76

    Partly Sunny

Today 30 Sep Flathead/Mission Valleys

Mostly cloudy. A 20 percent chance of rain Showers in the morning. Highs in the 60s.

Tonight 30 Sep Flathead/Mission Valleys

Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 30s to lower 40s.

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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 28 September, 2026

    26.1 °F

  • Average September

    55.4 °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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