Summerville Weather Forecast

    • 25
    • 50

    Chance Rain/Snow

    • 26
    • 53

    Mostly Cloudy

    • 23
    • 55

    Partly Sunny

    • 27
    • 53

    Chance Rain/Snow

    • 23
    • 51

    Partly Sunny

    • 27
    • 55

    Partly Sunny

Today 28 Oct Grande Ronde Valley

Mostly cloudy. A chance of rain or snow Showers in the Morning, then a chance of rain Showers in the afternoon. Highs in the lower 50s. South wind 5 to 15 Mph. Chance of precipitation 50 percent.

Tonight 28 Oct Grande Ronde Valley

Mostly cloudy. A 20 percent chance of rain Showers in the evening. Patchy fog overnight. Lows in the lower to mid 20s. Light wind.

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Summerville Temperature Statistics

October Temperature

La Grande/Union County Airport (13 miles)

  • Lowest 13 October, 2026

    21 °F

  • Average October

    51.8 °F

  • Highest 4 October, 2026

    89.1 °F

Climate (2021–2026)

La Grande/Union County Airport (13 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    62.8 °F
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