La Grande/Union County Airport Weather Forecast

    • 52
    • 87

    Partly Sunny

    • 56
    • 92

    Partly Sunny

    • 57
    • 93

    Partly Sunny

    • 58
    • 95

    Mostly Sunny

    • 58
    • 96

    Mostly Sunny

    • 57
    • 96

    Mostly Sunny

Today 29 Aug Grande Ronde Valley

Sunny. Haze through the day. Highs in the lower 90s. Light wind.

Tonight 29 Aug Grande Ronde Valley

Partly cloudy. Haze through the night. Lows in the lower to mid 50s. Light wind.

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La Grande/Union County Airport Temperature Statistics

August Temperature

La Grande/Union County Airport (0 miles)

  • Lowest 5 August, 2025

    42.7 °F

  • Average August

    69.5 °F

  • Highest 23 August, 2025

    98.1 °F

Climate (2020–Present)

La Grande/Union County Airport (0 miles)

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  • Average Low 2020–2025

    37.8 °F

  • Average 2020–2025

    50.1 °F

  • Average High 2020–2025

    62.3 °F
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