Summerville Weather Forecast

    • 51
    • 89

    Increasing Clouds

    • 52
    • 88

    Partly Sunny

    • 49
    • 84

    Rain Showers

    • 44
    • 69

    Rain Showers

    • 40
    • 63

    Chance Rain Showers

    • 41
    • 63

    Chance Rain Showers

Today 23 Jun Grande Ronde Valley

Sunny in the Morning, becoming partly cloudy. Highs around 90. Light wind.

Tonight 23 Jun Grande Ronde Valley

Mostly cloudy. Lows in the lower to mid 50s. North wind 5 to 10 Mph in the Evening, becoming light.

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Summerville Temperature Statistics

June Temperature

La Grande/Union County Airport (13 miles)

  • Lowest 11 June, 2026

    36 °F

  • Average June

    62 °F

  • Highest 15 June, 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

    50.7 °F

  • Average High 2021–2026

    62.8 °F
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