Asotin Weather Forecast

    • 57
    • 82

    Rain Showers

    • 49
    • 68

    Rain Showers

    • 49
    • 74

    Mostly Sunny

    • 51
    • 74

    Mostly Sunny

    • 51
    • 76

    Sunny

    • 53
    • 82

    Mostly Sunny

    • 56
    • 85

    Mostly Sunny

Today 12 Sep Lower Garfield and Asotin Counties

Partly cloudy. Highs in the mid 70s to lower 80s.

Tonight 12 Sep Lower Garfield and Asotin Counties

Partly cloudy in the Evening, then rain Showers and a chance of Thunderstorms overnight. Lows in the upper 40s to mid 50s. West wind 5 to 15 Mph overnight. Gusts up to 30 Mph. Chance of precipitation near 100 percent. Rainfall Amounts up to a half inch Possible, except higher Amounts possible in Thunderstorms.

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Asotin Temperature Statistics

September Temperature

Lewiston, Lewiston-Nez Perce County Airport (2.5 miles)

  • Lowest 5 September, 2026

    49.6 °F

  • Average September

    64.9 °F

  • Highest 10 September, 2026

    88 °F

Climate (2021–2026)

Lewiston, Lewiston-Nez Perce County Airport (2.5 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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