La Grande/Union County Airport Weather Forecast

    • 63
    • 100

    Patchy Smoke

    • 48
    • 94

    Slight Chance Thunderstorms

    • 46
    • 86

    Sunny

    • 54
    • 92

    Mostly Sunny

    • 55
    • 95

    Partly Sunny

    • 49
    • 91

    Mostly Sunny

    • 45
    • 85

    Mostly Sunny

Today 21 Aug Grande Ronde Valley

Very hot. Mostly cloudy. Patchy smoke. Highs 100 to 101. Light wind.

Tonight 21 Aug Grande Ronde Valley

Mostly cloudy. Patchy smoke through the night. Lows in the lower to mid 60s. Northwest wind 5 to 10 Mph.

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La Grande/Union County Airport Temperature Statistics

August Temperature

La Grande/Union County Airport (0 miles)

  • Lowest 5 August, 2026

    43 °F

  • Average August

    70.8 °F

  • Highest 7 August, 2026

    99 °F

Climate (2021–2026)

La Grande/Union County Airport (0 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    62.7 °F
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