Polson Bay Weather Forecast

    • 52
    • 87

    Decreasing Clouds

    • 52
    • 89

    Mostly Sunny

    • 53
    • 92

    Mostly Sunny

    • 56
    • 92

    Partly Sunny

    • 50
    • 88

    Chance Rain Showers

    • 48
    • 82

    Mostly Sunny

    • 51
    • 85

    Mostly Sunny

Today 18 Aug Flathead/Mission Valleys

Mostly cloudy. Slight chance of rain early in the afternoon. Slight chance of Showers and Thunderstorms late in the afternoon. Chance of precipitation 20 percent. Highs in the upper 70s to mid 80s.

Tonight 18 Aug Flathead/Mission Valleys

Mostly clear. Lows in the upper 40s to mid 50s. West Winds to 15 Mph in the evening.

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  • Temperature Real-Time

Polson Bay Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (41.6 miles)

  • Lowest 5 August, 2026

    38.6 °F

  • Average August

    63.7 °F

  • Highest 1 August, 2026

    93.7 °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

    45.3 °F

  • Average High 2021–2026

    56.9 °F
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