Rainbow Lake Weather Forecast

    • 55
    • 70

    Increasing Clouds

    • 50
    • 74

    Rain Showers

    • 49
    • 56

    Rain Showers

    • 50
    • 65

    Mostly Sunny

    • 51
    • 68

    Mostly Sunny

    • 54
    • 71

    Mostly Sunny

Today 11 Sep Northwest Blue Mountains

Partly cloudy. Highs in the mid 50s to lower 60s, except in the mid to upper 60s Valleys. Southwest wind 5 to 15 Mph with Gusts to around 25 Mph in the Morning, becoming light.

Tonight 11 Sep Northwest Blue Mountains

Partly cloudy. Lows in the mid 40s to lower 50s.

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Rainbow Lake Temperature Statistics

September Temperature

Lewiston, Lewiston-Nez Perce County Airport (31.1 miles)

  • Lowest 5 September, 2026

    49.6 °F

  • Average September

    63.8 °F

  • Highest 1 September, 2026

    80.7 °F

Climate (2021–2026)

Lewiston, Lewiston-Nez Perce County Airport (31.1 miles)

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  • Average Low 2021–2026

    45.5 °F

  • Average 2021–2026

    55.5 °F

  • Average High 2021–2026

    65.9 °F
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