Polson Bay Weather Forecast

    • 47
    • 80

    Rain Likely

    • 43
    • 64

    Chance Rain

    • 40
    • 66

    Rain

    • 37
    • 58

    Rain

    • 37
    • 61

    Partly Sunny

    • 41
    • 65

    Partly Sunny

Today 10 Sep Flathead/Mission Valleys

Mostly cloudy. A 20 percent chance of rain early in the morning. Highs in the 70s to lower 80s. Southwest Winds to 15 Mph in the afternoon.

Tonight 10 Sep Flathead/Mission Valleys

Chance of rain Showers and a slight chance of Thunderstorms early in the Evening, then Areas of rain late in the evening. Rain Showers likely and a slight chance of Thunderstorms after midnight. Chance of precipitation 90 percent. Lows in the 40s to lower 50s. Southwest Winds to 15 Mph in the evening.

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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

    58.1 °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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