Summerville Weather Forecast

    • 27
    • 55

    Rain Likely

    • 33
    • 57

    Partly Sunny

    • 41
    • 61

    Mostly Cloudy

    • 39
    • 61

    Rain Likely

    • 30
    • 58

    Chance Rain/Snow

    • 27
    • 51

    Partly Sunny

Today 21 Mar Grande Ronde Valley

Cloudy with rain in the Morning, then partly sunny with a chance of rain in the afternoon. Highs in the mid to upper 50s. Northwest wind 5 to 15 Mph. Gusts up to 25 Mph in the afternoon. Chance of precipitation 90 percent. Rainfall Amounts less than a quarter of an inch.

Tonight 21 Mar Grande Ronde Valley

Mostly clear. Lows in the upper 20s. Northwest wind 5 to 15 Mph with Gusts to around 25 Mph in the Evening, becoming light.

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Summerville Temperature Statistics

March Temperature

La Grande/Union County Airport (13 miles)

  • Lowest 3 March, 2026

    21.9 °F

  • Average March

    44.8 °F

  • Highest 18 March, 2026

    75.9 °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

    50.6 °F

  • Average High 2021–2026

    62.8 °F
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