Polson Bay Weather Forecast

    • 40
    • 61

    Mostly Cloudy

    • 43
    • 65

    Mostly Cloudy

    • 43
    • 69

    Mostly Sunny

    • 47
    • 74

    Mostly Sunny

    • 46
    • 72

    Slight Chance Rain

    • 45
    • 72

    Mostly Sunny

    • 45
    • 72

    Mostly Sunny

Today 14 Sep Flathead/Mission Valleys

Mostly cloudy with a 50 percent chance of Areas of rain. Highs in the mid 50s to lower 60s.

Tonight 14 Sep Flathead/Mission Valleys

Mostly cloudy. Patchy fog after midnight. Lows in the upper 30s to mid 40s.

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  • Temperature Real-Time

Polson Bay Temperature Statistics

September Temperature

Kalispell, Glacier Park International Airport (41.6 miles)

  • Lowest 1 September, 2026

    41.6 °F

  • Average September

    58.2 °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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