Polson Bay Weather Forecast

    • 40
    • 69

    Rain Likely

    • 41
    • 70

    Rain Likely

    • 41
    • 72

    Rain

    • 39
    • 66

    Rain Showers

    • 39
    • 70

    Slight Chance Rain

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    • 75

    Partly Sunny

Today 4 Sep Flathead/Mission Valleys

Mostly cloudy. Areas of rain early in the morning. Slight chance of rain early in the afternoon. Patchy fog early in the morning. Chance of rain 50 percent. Highs in the 60s.

Tonight 4 Sep Flathead/Mission Valleys

Partly cloudy in the Evening, then mostly cloudy with a 50 percent chance of rain after midnight. Patchy fog after midnight. Lows in the upper 30s to mid 40s.

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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

    60.5 °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

    33.3 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    57 °F
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