Sweetwater Weather Forecast

    • 47
    • 78

    Breezy

    • 45
    • 78

    Patchy Smoke

    • 52
    • 88

    Mostly Sunny

    • 52
    • 88

    Chance Rain Showers

    • 49
    • 79

    Chance Rain Showers

    • 45
    • 75

    Chance Rain Showers

    • 46
    • 76

    Chance Rain Showers

Today 29 Aug Lewiston Area

Partly cloudy. Highs in the lower 70s to lower 80s. Windy. West wind 15 to 25 Mph with Gusts up to 40 Mph.

Tonight 29 Aug Lewiston Area

Mostly clear. Lows in the mid 40s to lower 50s. West wind 5 to 15 Mph with Gusts up to 35 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sweetwater Temperature Statistics

August Temperature

Lewiston, Lewiston-Nez Perce County Airport (10.6 miles)

  • Lowest 3 August, 2026

    54.6 °F

  • Average August

    77.4 °F

  • Highest 21 August, 2026

    106.6 °F

Climate (2021–2026)

Lewiston, Lewiston-Nez Perce County Airport (10.6 miles)

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  • Average Low 2021–2026

    45.5 °F

  • Average 2021–2026

    55.5 °F

  • Average High 2021–2026

    66 °F
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