Winchester Weather Forecast

    • 34
    • 50

    Rain

    • 29
    • 44

    Snow Likely

    • 34
    • 40

    Rain/Snow

    • 27
    • 40

    Snow

    • 26
    • 37

    Chance Snow

    • 30
    • 37

    Rain/Snow Likely

    • 31
    • 42

    Chance Rain/Snow

Today 16 Dec Lewis and Southern Nez Perce Counties

Mostly cloudy with a 20 percent chance of rain. Highs in the 50s. Southwest wind 5 to 15 Mph with Gusts up to 25 Mph.

Tonight 16 Dec Lewis and Southern Nez Perce Counties

Rain overnight. Lows in the mid 30s to lower 40s. Temperature rising into the upper 40s after midnight. Windy. Southwest wind 15 to 25 Mph. Gusts up to 30 Mph increasing to 50 Mph overnight. Chance of precipitation near 100 percent. Rainfall Amounts up to a half inch possible.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Winchester Temperature Statistics

December Temperature

Lewiston, Lewiston-Nez Perce County Airport (20.5 miles)

  • Lowest 1 December, 2025

    28 °F

  • Average December

    45 °F

  • Highest 10 December, 2025

    64.9 °F

Climate (2020–Present)

Lewiston, Lewiston-Nez Perce County Airport (20.5 miles)

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  • Average Low 2020–2025

    45.7 °F

  • Average 2020–2025

    55.7 °F

  • Average High 2020–2025

    66 °F
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