Lower Granite Lake Weather Forecast

    • 59
    • 79

    Chance Rain Showers

    • 61
    • 87

    Slight Chance Thunderstorms

    • 63
    • 93

    Sunny

    • 65
    • 97

    Hot

    • 64
    • 94

    Mostly Sunny

    • 65
    • 94

    Partly Sunny

    • 65
    • 95

    Mostly Sunny

Today 21 Jul Washington Palouse

Mostly cloudy with a 50 percent chance of rain Showers. Highs in the upper 60s to mid 70s. Light wind. Rainfall Amounts less than a tenth of an inch.

Tonight 21 Jul Washington Palouse

A chance of Thunderstorms in the evening. Mostly cloudy with a chance of rain Showers. Lows in the upper 40s to upper 50s. Light wind. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

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Lower Granite Lake Temperature Statistics

July Temperature

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

  • Lowest 7 July, 2025

    58.6 °F

  • Average July

    80.9 °F

  • Highest 8 July, 2025

    104.6 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    45.4 °F

  • Average 2020–2025

    55.4 °F

  • Average High 2020–2025

    65.8 °F
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