Polson Bay Weather Forecast

    • 35
    • 62

    Mostly Cloudy

    • 39
    • 66

    Chance Rain Showers

    • 39
    • 65

    Rain Showers Likely

    • 41
    • 68

    Partly Sunny

    • 43
    • 73

    Partly Sunny

    • 47
    • 77

    Partly Sunny

    • 46
    • 77

    Partly Sunny

Today 18 May Flathead/Mission Valleys

Mostly sunny. Widespread frost early in the morning. Chance of rain Showers and a slight chance of Thunderstorms in the afternoon. Chance of precipitation 30 percent. Highs in the mid 50s to lower 60s.

Tonight 18 May Flathead/Mission Valleys

Mostly cloudy then becoming partly cloudy after midnight then becoming mostly cloudy. A 20 percent chance of rain in the evening. Areas of frost late in the night. Lows in the 30s.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Polson Bay Temperature Statistics

May Temperature

Kalispell, Glacier Park International Airport (41.6 miles)

  • Lowest 6 May, 2026

    29.6 °F

  • Average May

    53 °F

  • Highest 12 May, 2026

    76.6 °F

Climate (2021–Present)

Kalispell, Glacier Park International Airport (41.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    57.2 °F
Get WillyWeather+ to remove ads