Lower Granite Lake Weather Forecast

    • 51
    • 82

    Partly Sunny

    • 52
    • 79

    Partly Sunny

    • 55
    • 87

    Chance Rain Showers

    • 48
    • 74

    Chance Rain Showers

    • 46
    • 68

    Partly Sunny

    • 47
    • 69

    Partly Sunny

Today 22 Sep Washington Palouse

Mostly cloudy. Highs in the 70s. Light Wind, becoming southwest 5 to 10 Mph in the Afternoon, Gusts up to 20 Mph in the afternoon.

Tonight 22 Sep Washington Palouse

Mostly clear. Lows in the mid 40s to lower 50s. Southwest wind 5 to 10 Mph.

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Lower Granite Lake Temperature Statistics

September Temperature

Lewiston, Lewiston-Nez Perce County Airport (22.4 miles)

  • Lowest 5 September, 2026

    49.6 °F

  • Average September

    64.6 °F

  • Highest 10 September, 2026

    88.6 °F

Climate (2021–2026)

Lewiston, Lewiston-Nez Perce County Airport (22.4 miles)

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  • Average Low 2021–2026

    45.5 °F

  • Average 2021–2026

    55.5 °F

  • Average High 2021–2026

    65.9 °F
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