La Grande Reservoir Weather Forecast

    • 50
    • 77

    Increasing Clouds

    • 50
    • 77

    Partly Sunny

    • 47
    • 74

    Partly Sunny

    • 40
    • 64

    Chance Rain Showers

    • 47
    • 69

    Mostly Sunny

    • 48
    • 75

    Partly Sunny

Today 18 Sep Southern Blue Mountains of Oregon

Sunny. Highs in the mid 70s to lower 80s.

Tonight 18 Sep Southern Blue Mountains of Oregon

Mostly cloudy. Lows in the 50s.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

La Grande Reservoir Temperature Statistics

September Temperature

La Grande/Union County Airport (13.7 miles)

  • Lowest 16 September, 2025

    42.1 °F

  • Average September

    67.1 °F

  • Highest 2 September, 2025

    100.9 °F

Climate (2020–Present)

La Grande/Union County Airport (13.7 miles)

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

  • Average Low 2020–2025

    37.9 °F

  • Average 2020–2025

    50.2 °F

  • Average High 2020–2025

    62.3 °F
Get WillyWeather+ to remove ads