Summerville Weather Forecast

    • 31
    • 43

    Chance Rain/Snow

    • 32
    • 44

    Chance Rain/Snow

    • 35
    • 43

    Chance Rain

    • 34
    • 46

    Chance Rain

    • 36
    • 49

    Mostly Cloudy

    • 34
    • 50

    Chance Rain

Today 27 Jan Grande Ronde Valley

Mostly sunny in the Morning, becoming mostly cloudy. Highs in the lower to mid 40s. South wind 5 to 15 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 27 Jan Grande Ronde Valley

Mostly cloudy. A 30 percent chance of rain or snow overnight. Lows in the lower 30s. Breezy. South wind 10 to 20 Mph with Gusts to around 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Summerville Temperature Statistics

January Temperature

La Grande/Union County Airport (13 miles)

  • Lowest 25 January, 2026

    8.1 °F

  • Average January

    34.1 °F

  • Highest 3 January, 2026

    54 °F

Climate (2021–Present)

La Grande/Union County Airport (13 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    62.6 °F
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