Summerville Weather Forecast

    • 42
    • 80

    Sunny

    • 43
    • 84

    Sunny

    • 44
    • 83

    Mostly Sunny

    • 35
    • 79

    Partly Sunny

    • 31
    • 58

    Slight Chance Rain Showers

    • 28
    • 54

    Slight Chance Rain Showers

    • 28
    • 58

    Partly Sunny

Today 6 Oct Grande Ronde Valley

Mostly sunny. Highs in the lower 60s.

Tonight 6 Oct Grande Ronde Valley

Clear. Lows in the lower to mid 40s. Light wind.

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  • Temperature Real-Time

Summerville Temperature Statistics

October Temperature

La Grande/Union County Airport (13 miles)

  • Lowest 3 October, 2026

    35.1 °F

  • Average October

    58.5 °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

    38.3 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    62.7 °F
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