La Grande Reservoir Weather Forecast

    • 46
    • 67

    Rain Showers Likely

    • 48
    • 68

    Partly Sunny

    • 48
    • 66

    Mostly Cloudy

    • 50
    • 71

    Partly Sunny

    • 54
    • 79

    Mostly Sunny

    • 51
    • 76

    Partly Sunny

Today 5 Sep Foothills and Valleys of Pierce and Southern King Counties

Mostly cloudy. A slight chance of Thunderstorms early in the afternoon. A chance of Showers and a slight chance of Thunderstorms late in the afternoon. Highs near 70. Light wind.

Tonight 5 Sep Foothills and Valleys of Pierce and Southern King Counties

Mostly cloudy with a chance of rain in the Evening, then partly cloudy after midnight. Lows near 50. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

La Grande Reservoir Temperature Statistics

September Temperature

Fort Lewis / Gray U. S. Army Airfield (23.6 miles)

  • Lowest 1 September, 2026

    51.1 °F

  • Average September

    60.5 °F

  • Highest 2 September, 2026

    69.1 °F

Climate (2021–2026)

Fort Lewis / Gray U. S. Army Airfield (23.6 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    52.1 °F

  • Average High 2021–2026

    61.4 °F
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