Polson Bay Weather Forecast

    • 45
    • 67

    Increasing Clouds

    • 40
    • 67

    Chance Rain Showers

    • 43
    • 67

    Mostly Cloudy

    • 42
    • 70

    Partly Sunny

    • 41
    • 68

    Partly Sunny

    • 43
    • 70

    Partly Sunny

Today 29 Sep Flathead/Mission Valleys

Mostly cloudy. Highs in the 60s. Southwest Winds 15 to 20 Mph in the afternoon.

Tonight 29 Sep Flathead/Mission Valleys

Mostly cloudy with a 40 percent chance of rain. Lows in the 40s. Southwest Winds to 15 Mph.

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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 26 September, 2026

    33.1 °F

  • Average September

    56.5 °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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