Polson Bay Weather Forecast
- 48
- 72
Chance Rain Showers
- 49
- 75
Increasing Clouds
- 48
- 74
Partly Sunny
- 48
- 76
Mostly Sunny
- 48
- 78
Mostly Sunny
- 47
- 75
Partly Sunny
- 45
- 71
Partly Sunny
Today 17 Sep Flathead/Mission Valleys
Partly cloudy. Highs in the mid 60s to lower 70s.
Tonight 17 Sep Flathead/Mission Valleys
Partly cloudy then becoming mostly cloudy in the late evening and early morning then becoming partly cloudy. A 30 percent chance of rain Showers late in the evening. Lows in the mid 40s to lower 50s.
Polson Bay Temperature Statistics
September Temperature
Kalispell, Glacier Park International Airport (41.6 miles)
Lowest 1 September, 2026
41.6 °FAverage September
56.8 °FHighest 1 September, 2026
84.7 °F
Climate (2021–2026)
Kalispell, Glacier Park International Airport (41.6 miles)
Average Low 2021–2026
33.4 °FAverage 2021–2026
45.4 °FAverage High 2021–2026
57 °F