Lewis Weather Forecast

    • 30
    • 49

    Rain/Snow Likely

    • 34
    • 58

    Chance Rain Showers

    • 38
    • 64

    Partly Sunny

    • 39
    • 66

    Partly Sunny

    • 41
    • 69

    Mostly Sunny

    • 42
    • 71

    Mostly Sunny

    • 42
    • 74

    Mostly Sunny

Today 17 May Wallowa County

Mostly cloudy with a chance of rain Showers, high mountain snow Showers and Thunderstorms. Highs in the upper 30s to mid 40s, except in the upper 40s to mid 50s Valleys. North wind 5 to 15 Mph with Gusts to around 35 Mph. Chance of precipitation 50 percent.

Tonight 17 May Wallowa County

Partly cloudy. A chance of rain and high mountain snow Showers. Lows in the mid 20s to mid 30s. North wind 5 to 15 Mph with Gusts to around 40 Mph in the Evening, becoming light. Chance of precipitation 50 percent.

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Lewis Temperature Statistics

May Temperature

Grangeville - Idaho County Airport (49.1 miles)

  • Lowest 1 May, 2026

    33.8 °F

  • Average May

    55.6 °F

  • Highest 12 May, 2026

    80.6 °F

Climate (2021–Present)

Grangeville - Idaho County Airport (49.1 miles)

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  • Average Low 2021–2026

    37.1 °F

  • Average 2021–2026

    47.5 °F

  • Average High 2021–2026

    58 °F
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