Polson Bay Weather Forecast

    • 50
    • 87

    Increasing Clouds

    • 40
    • 74

    Rain Showers Likely

    • 37
    • 68

    Rain Showers Likely

    • 39
    • 70

    Chance Rain

    • 43
    • 75

    Chance Rain

    • 44
    • 76

    Chance Rain

Today 1 Sep Flathead/Mission Valleys

Mostly cloudy in the morning then clearing. Highs in the 80s.

Tonight 1 Sep Flathead/Mission Valleys

Mostly cloudy. A 20 percent chance of rain Showers in the evening. Lows in the mid 40s to lower 50s. Southwest Winds to 15 Mph.

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Polson Bay Temperature Statistics

September Temperature

Kalispell, Glacier Park International Airport (41.6 miles)

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  • Average September

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Climate (2021–2026)

Kalispell, Glacier Park International Airport (41.6 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    57 °F
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