Kilbrennan Lake Weather Forecast

    • 57
    • 76

    Increasing Clouds

    • 59
    • 79

    Partly Sunny

    • 60
    • 85

    Mostly Sunny

    • 57
    • 82

    Mostly Sunny

    • 56
    • 81

    Mostly Sunny

    • 58
    • 84

    Mostly Sunny

Today 17 Aug Kootenai/Cabinet Region

Mostly cloudy early in the morning then clearing. Patchy fog early in the morning. 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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Kilbrennan Lake Temperature Statistics

August Temperature

Boundary County Airport (20.5 miles)

  • Lowest 8 August, 2025

    48.2 °F

  • Average August

    69.6 °F

  • Highest 11 August, 2025

    91.4 °F

Climate (2020–Present)

Boundary County Airport (20.5 miles)

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  • Average Low 2020–2025

    37.4 °F

  • Average 2020–2025

    46.9 °F

  • Average High 2020–2025

    56.4 °F
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