Winchester Lake Weather Forecast

    • 30
    • 50

    Mostly Sunny

    • 35
    • 51

    Mostly Sunny

    • 33
    • 54

    Partly Sunny

    • 42
    • 56

    Rain

    • 35
    • 52

    Rain/Snow Likely

    • 32
    • 47

    Slight Chance Rain/Snow

    • 34
    • 50

    Mostly Cloudy

Today 15 Oct Lewis and Southern Nez Perce Counties

Sunny. Highs in the 50s.

Tonight 15 Oct Lewis and Southern Nez Perce Counties

Mostly clear. Areas of frost overnight. Lows in the upper 20s to upper 30s. Gusts up to 20 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Winchester Lake Temperature Statistics

October Temperature

Grangeville - Idaho County Airport (30.4 miles)

  • Lowest 6 October, 2025

    32 °F

  • Average October

    50.5 °F

  • Highest 10 October, 2025

    80.6 °F

Climate (2020–Present)

Grangeville - Idaho County Airport (30.4 miles)

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  • Average Low 2020–2025

    36.6 °F

  • Average 2020–2025

    47 °F

  • Average High 2020–2025

    57.6 °F
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