Polson Bay Weather Forecast

    • 48
    • 78

    Becoming Sunny

    • 48
    • 82

    Mostly Sunny

    • 49
    • 83

    Mostly Sunny

    • 50
    • 83

    Partly Sunny

    • 50
    • 83

    Partly Sunny

    • 45
    • 72

    Partly Sunny

Today 16 Sep Flathead/Mission Valleys

Warmer, sunny. Highs 72 to 78. North Winds up to 5 Mph.

Tonight 16 Sep Flathead/Mission Valleys

Mostly clear. Lows 46 to 52. Northeast Winds up to 5 Mph.

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Polson Bay Temperature Statistics

September Temperature

Kalispell, Glacier Park International Airport (41.6 miles)

  • Lowest 9 September, 2025

    44.1 °F

  • Average September

    67.1 °F

  • Highest 2 September, 2025

    93.2 °F

Climate (2020–Present)

Kalispell, Glacier Park International Airport (41.6 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    45.2 °F

  • Average High 2020–2025

    56.8 °F
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