Lewis Weather Forecast

    • 49
    • 82

    Mostly Sunny

    • 51
    • 83

    Mostly Sunny

    • 50
    • 82

    Partly Sunny

    • 48
    • 78

    Partly Sunny

    • 44
    • 72

    Mostly Sunny

    • 47
    • 77

    Mostly Sunny

Today 17 Sep Wallowa County

Sunny. Highs in the upper 60s to upper 70s, except in the upper 70s to mid 80s Valleys.

Tonight 17 Sep Wallowa County

Mostly clear. Lows in the upper 40s to upper 50s.

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Lewis Temperature Statistics

September Temperature

Grangeville - Idaho County Airport (49.1 miles)

  • Lowest 11 September, 2025

    46.4 °F

  • Average September

    66.5 °F

  • Highest 2 September, 2025

    98.6 °F

Climate (2020–Present)

Grangeville - Idaho County Airport (49.1 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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