La Grande/Union County Airport Weather Forecast

    • 40
    • 71

    Becoming Sunny

    • 43
    • 79

    Mostly Sunny

    • 46
    • 85

    Sunny

    • 46
    • 83

    Partly Sunny

    • 48
    • 83

    Partly Sunny

    • 49
    • 83

    Partly Sunny

Today 15 Sep Grande Ronde Valley

Partly cloudy in the Morning, becoming sunny. Patchy fog in the morning. Highs in the lower 70s. Light wind.

Tonight 15 Sep Grande Ronde Valley

Mostly clear. Lows in the lower 40s. Light Wind, becoming northeast 5 to 10 Mph overnight.

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La Grande/Union County Airport Temperature Statistics

September Temperature

La Grande/Union County Airport (0 miles)

  • Lowest 7 September, 2025

    48 °F

  • Average September

    69.5 °F

  • Highest 2 September, 2025

    100.9 °F

Climate (2020–Present)

La Grande/Union County Airport (0 miles)

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  • Average Low 2020–2025

    37.9 °F

  • Average 2020–2025

    50.2 °F

  • Average High 2020–2025

    62.3 °F
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