Polson Bay Weather Forecast

    • 48
    • 72

    Rain Likely

    • 48
    • 72

    Rain

    • 39
    • 61

    Rain

    • 40
    • 70

    Partly Sunny

    • 43
    • 76

    Mostly Sunny

    • 45
    • 78

    Partly Sunny

Today 5 Sep Flathead/Mission Valleys

Mostly cloudy. A 50 percent chance of Areas of rain in the morning. Patchy fog early in the morning. Highs in the mid 60s to lower 70s.

Tonight 5 Sep Flathead/Mission Valleys

Slight chance of Thunderstorms. Slight chance of rain Showers in the Evening, then rain Showers likely after midnight. Chance of precipitation 70 percent. Lows in the mid 40s to lower 50s.

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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 1 September, 2026

    41.6 °F

  • Average September

    59.9 °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

    33.3 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    57 °F
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