Lewiston Weather Forecast

    • 43
    • 55

    Rain Showers

    • 43
    • 59

    Slight Chance Rain Showers

    • 43
    • 62

    Mostly Cloudy

    • 44
    • 65

    Mostly Sunny

    • 47
    • 68

    Partly Sunny

    • 50
    • 71

    Partly Sunny

Today 20 Sep Lewiston Area

Rain likely in the Morning, then widespread rain Showers and a chance of Thunderstorms in the afternoon. Highs in the upper 40s to mid 50s. West wind 5 to 15 Mph with Gusts to around 25 Mph in the afternoon. Chance of precipitation 90 percent. Rainfall Amounts between a tenth and a quarter of an inch Possible, except higher Amounts possible in Thunderstorms.

Tonight 20 Sep Lewiston Area

Mostly cloudy. A chance of Showers and early evening Thunderstorms. Lows in the upper 30s to lower 40s. Southwest wind 5 to 15 Mph in the Evening, becoming light. Chance of precipitation 50 percent. Rainfall Amounts less than a quarter of an Inch, except higher Amounts possible in Thunderstorms.

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Lewiston Temperature Statistics

September Temperature

Lewiston, Lewiston-Nez Perce County Airport (1.9 miles)

  • Lowest 16 September, 2017

    41 °F
  • Average September

    70.4 °F
  • Highest 2 September, 2017

    100 °F

Climate (2010–Present)

Lewiston, Lewiston-Nez Perce County Airport (1.9 miles)

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  • Average Low 2010–Present

    45.2 °F
  • Average 2010–Present

    55.4 °F
  • Average High 2010–Present

    65.6 °F
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