La Grande/Union County Airport Weather Forecast

    • 43
    • 81

    Rain Showers

    • 39
    • 60

    Rain Showers

    • 39
    • 69

    Mostly Sunny

    • 39
    • 71

    Mostly Sunny

    • 41
    • 74

    Mostly Sunny

    • 46
    • 81

    Mostly Sunny

Today 12 Sep Grande Ronde Valley

Partly cloudy in the Morning, becoming mostly cloudy. Highs in the lower 80s. Light wind.

Tonight 12 Sep Grande Ronde Valley

Rain Showers likely and a chance of Thunderstorms in the Evening, then rain Showers and a chance of Thunderstorms overnight. Lows in the lower to mid 40s. Windy. North wind 5 to 15 Mph shifting to the west 15 to 25 Mph overnight. Chance of precipitation 90 percent. Rainfall Amounts up to a half of an inch Possible, except higher Amounts possible in Thunderstorms.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

La Grande/Union County Airport Temperature Statistics

September Temperature

La Grande/Union County Airport (0 miles)

  • Lowest 4 September, 2026

    39 °F

  • Average September

    57.7 °F

  • Highest 9 September, 2026

    84.9 °F

Climate (2021–2026)

La Grande/Union County Airport (0 miles)

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

  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    62.7 °F
Get WillyWeather+ to remove ads