Granite Lake Weather Forecast

    • 44
    • 48

    Rain Likely

    • 48
    • 61

    Mostly Sunny

    • 49
    • 66

    Sunny

    • 49
    • 65

    Partly Sunny

    • 49
    • 64

    Partly Sunny

    • 48
    • 63

    Slight Chance Thunderstorms

Today 15 Sep Kootenai/Cabinet Region

Mostly cloudy. A chance of rain in the Morning, then chance of rain Showers and a slight chance of Thunderstorms in the afternoon. Areas of fog in the morning. Chance of precipitation 50 percent. Highs in the mid 60s to lower 70s.

Tonight 15 Sep Kootenai/Cabinet Region

Partly cloudy. A 20 percent chance of rain in the evening. Patchy fog after midnight. Lows in the 40s.

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Granite Lake Temperature Statistics

September Temperature

Sandpoint, Sandpoint Airport (39.8 miles)

  • Lowest 10 September, 2025

    48.2 °F

  • Average September

    68.8 °F

  • Highest 1 September, 2025

    95 °F

Climate (2020–Present)

Sandpoint, Sandpoint Airport (39.8 miles)

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  • Average Low 2020–2025

    36.7 °F

  • Average 2020–2025

    46.7 °F

  • Average High 2020–2025

    56.9 °F
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