Grouse Flat State Wildlife Recreation Area Weather Forecast

    • 50
    • 81

    Increasing Clouds

    • 44
    • 57

    Rain Showers Likely

    • 41
    • 58

    Mostly Sunny

    • 40
    • 57

    Mostly Cloudy

    • 36
    • 48

    Slight Chance Rain Showers

    • 38
    • 52

    Partly Sunny

Today 12 May Northeast Blue Mountains

Partly cloudy. Highs in the upper 70s to mid 80s. East wind 5 to 15 Mph with Gusts up to 25 Mph.

Tonight 12 May Northeast Blue Mountains

Mostly cloudy. Lows in the lower to mid 50s. Gusts up to 25 Mph.

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Grouse Flat State Wildlife Recreation Area Temperature Statistics

May Temperature

Lewiston, Lewiston-Nez Perce County Airport (33.6 miles)

  • Lowest 1 May, 2026

    44.7 °F

  • Average May

    65.2 °F

  • Highest 2 May, 2026

    83.6 °F

Climate (2021–Present)

Lewiston, Lewiston-Nez Perce County Airport (33.6 miles)

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    55.8 °F

  • Average High 2021–2026

    66.2 °F
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