Dworshak Reservoir Weather Forecast

    • 49
    • 68

    Chance Rain Showers

    • 54
    • 81

    Sunny

    • 54
    • 85

    Sunny

    • 56
    • 87

    Partly Sunny

    • 58
    • 87

    Partly Sunny

    • 57
    • 86

    Partly Sunny

Today 15 Sep Northern Clearwater Mountains

Mostly cloudy. A 50 percent chance of rain Showers in the morning. Patchy fog early in the morning. Highs in the upper 50s to mid 60s.

Tonight 15 Sep Northern Clearwater Mountains

Mostly clear. Lows in the mid 30s to lower 40s.

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Dworshak Reservoir Temperature Statistics

September Temperature

Lewiston, Lewiston-Nez Perce County Airport (39.1 miles)

  • Lowest 13 September, 2025

    57 °F

  • Average September

    75.8 °F

  • Highest 2 September, 2025

    102 °F

Climate (2020–Present)

Lewiston, Lewiston-Nez Perce County Airport (39.1 miles)

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  • Average Low 2020–2025

    45.5 °F

  • Average 2020–2025

    55.5 °F

  • Average High 2020–2025

    65.9 °F
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