Summerville Weather Forecast

    • 39
    • 62

    Rain Showers Likely

    • 36
    • 63

    Chance Rain Showers

    • 41
    • 76

    Sunny

    • 44
    • 80

    Sunny

    • 46
    • 82

    Sunny

    • 48
    • 86

    Mostly Sunny

Today 9 Jun Grande Ronde Valley

Mostly cloudy. A chance of rain Showers in the Morning, then a chance of Showers and Thunderstorms in the afternoon. Highs in the lower to mid 60s. Breezy. West wind 10 to 20 Mph with Gusts to around 30 Mph. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 9 Jun Grande Ronde Valley

Mostly cloudy. A 50 percent chance of rain Showers overnight. Lows around 40. Breezy. West wind 10 to 20 Mph with Gusts to around 30 Mph. Rainfall Amounts less than a tenth of an inch.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Summerville Temperature Statistics

June Temperature

La Grande/Union County Airport (13 miles)

  • Lowest 2 June, 2026

    37.9 °F

  • Average June

    58.6 °F

  • Highest 2 June, 2026

    79 °F

Climate (2021–Present)

La Grande/Union County Airport (13 miles)

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  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    62.8 °F
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