Grob Lake Weather Forecast

    • 52
    • 77

    Slight Chance Thunderstorms

    • 55
    • 83

    Mostly Sunny

    • 53
    • 81

    Mostly Sunny

    • 53
    • 81

    Mostly Sunny

    • 53
    • 81

    Slight Chance Thunderstorms

    • 56
    • 85

    Mostly Sunny

Today 23 Jul Kootenai/Cabinet Region

Partly cloudy. Areas of fog in the morning. A 20 percent chance of Showers and Thunderstorms in the afternoon. Highs in the upper 70s to mid 80s.

Tonight 23 Jul Kootenai/Cabinet Region

Mostly clear. Lows in the upper 40s to mid 50s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grob Lake Temperature Statistics

July Temperature

Boundary County Airport (54.1 miles)

  • Lowest 16 July, 2025

    44.6 °F

  • Average July

    69 °F

  • Highest 1 July, 2025

    93.2 °F

Climate (2020–Present)

Boundary County Airport (54.1 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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