Rainbow Lake Weather Forecast

    • 60
    • 81

    Increasing Clouds

    • 51
    • 66

    Rain Showers

    • 55
    • 68

    Mostly Sunny

    • 60
    • 78

    Sunny

    • 55
    • 81

    Mostly Sunny

    • 52
    • 69

    Partly Sunny

    • 54
    • 71

    Slight Chance Rain Showers

Today 13 Sep Northwest Blue Mountains

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

Tonight 13 Sep Northwest Blue Mountains

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rainbow Lake Temperature Statistics

September Temperature

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

  • Lowest 11 September, 2025

    57.9 °F

  • Average September

    77 °F

  • Highest 2 September, 2025

    102 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    45.5 °F

  • Average 2020–2025

    55.5 °F

  • Average High 2020–2025

    65.9 °F
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