Summerville Weather Forecast

    • 46
    • 85

    Chance Rain Showers

    • 45
    • 72

    Rain Showers

    • 40
    • 65

    Rain Showers

    • 40
    • 68

    Rain Showers Likely

    • 42
    • 74

    Chance Rain Showers

    • 44
    • 77

    Rain Showers Likely

    • 43
    • 72

    Rain Showers Likely

Today 1 Sep Grande Ronde Valley

Mostly cloudy with a 20 percent chance of Showers. Highs in the mid 80s. South wind 5 to 15 Mph.

Tonight 1 Sep Grande Ronde Valley

Partly cloudy. Patchy smoke through the night. A 30 percent chance of rain Showers overnight. Lows in the mid to upper 40s. West wind 5 to 10 Mph with Gusts to around 20 Mph.

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Summerville Temperature Statistics

September Temperature

La Grande/Union County Airport (13 miles)

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Climate (2021–2026)

La Grande/Union County Airport (13 miles)

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  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    62.8 °F
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