Upper Thompson Lake Weather Forecast

    • 53
    • 78

    Partly Sunny

    • 56
    • 83

    Mostly Sunny

    • 57
    • 90

    Mostly Sunny

    • 53
    • 84

    Mostly Sunny

    • 52
    • 84

    Sunny

    • 53
    • 85

    Mostly Sunny

Today 17 Aug Kootenai/Cabinet Region

Partly cloudy. Highs in the upper 70s to mid 80s.

Tonight 17 Aug Kootenai/Cabinet Region

Partly cloudy. Lows in the mid 40s to lower 50s.

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Upper Thompson Lake Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (42.9 miles)

  • Lowest 6 August, 2025

    46.7 °F

  • Average August

    66.7 °F

  • Highest 12 August, 2025

    91.7 °F

Climate (2020–Present)

Kalispell, Glacier Park International Airport (42.9 miles)

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  • Average Low 2020–2025

    33 °F

  • Average 2020–2025

    45.1 °F

  • Average High 2020–2025

    56.8 °F
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