Summerville Weather Forecast

    • 37
    • 65

    Mostly Sunny

    • 42
    • 69

    Mostly Cloudy

    • 42
    • 72

    Partly Sunny

    • 32
    • 63

    Mostly Sunny

    • 30
    • 55

    Chance Rain

    • 31
    • 56

    Mostly Sunny

Today 4 Apr Grande Ronde Valley

Sunny. Highs in the mid 60s. South wind 5 to 10 Mph.

Tonight 4 Apr Grande Ronde Valley

Mostly clear. Lows in the upper 30s. Southeast wind 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Summerville Temperature Statistics

April Temperature

La Grande/Union County Airport (13 miles)

  • Lowest 2 April, 2026

    35.1 °F

  • Average April

    42.7 °F

  • Highest 1 April, 2026

    53.1 °F

Climate (2021–Present)

La Grande/Union County Airport (13 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    62.8 °F
Get WillyWeather+ to remove ads