Summerville Weather Forecast

    • 49
    • 88

    Smoke

    • 50
    • 89

    Sunny

    • 50
    • 90

    Mostly Sunny

    • 53
    • 93

    Sunny

    • 45
    • 87

    Mostly Sunny

    • 43
    • 78

    Sunny

Today 28 Jul Grande Ronde Valley

Sunny. Patchy smoke in the Morning, then Areas of smoke in the afternoon. Highs in the upper 80s to lower 90s. Light Wind, becoming northwest 5 to 10 Mph in the afternoon.

Tonight 28 Jul Grande Ronde Valley

Mostly clear. Smoke in the evening. Lows in the lower to mid 50s. Northwest wind 5 to 15 Mph.

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Summerville Temperature Statistics

July Temperature

La Grande/Union County Airport (13 miles)

  • Lowest 2 July, 2026

    48 °F

  • Average July

    73.6 °F

  • Highest 15 July, 2026

    97 °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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