Polson Weather Forecast

    • 55
    • 92

    Chance Rain Showers

    • 48
    • 82

    Mostly Sunny

    • 50
    • 82

    Mostly Sunny

    • 53
    • 89

    Mostly Sunny

    • 51
    • 89

    Partly Sunny

    • 46
    • 81

    Mostly Sunny

Today 22 Aug Flathead/Mission Valleys

Mostly cloudy. Slight chance of rain until late Afternoon, then slight chance of Showers and Thunderstorms late in the afternoon. Chance of precipitation 20 percent. Some Thunderstorms may produce gusty Winds. Highs in the mid 80s to lower 90s.

Tonight 22 Aug Flathead/Mission Valleys

Mostly cloudy then becoming partly cloudy after midnight then becoming mostly cloudy. Chance of rain Showers through the night. Slight chance of Thunderstorms in the evening. Slight chance of Thunderstorms after midnight. Chance of precipitation 50 percent. Some Thunderstorms may produce gusty Winds. Lows in the 50s.

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Polson Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (42.3 miles)

  • Lowest 5 August, 2026

    38.6 °F

  • Average August

    64.3 °F

  • Highest 1 August, 2026

    93.7 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (42.3 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    45.3 °F

  • Average High 2021–2026

    57 °F
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