La Grande/Union County Airport Weather Forecast

    • 44
    • 77

    Increasing Clouds

    • 45
    • 82

    Partly Sunny

    • 47
    • 82

    Mostly Sunny

    • 40
    • 82

    Rain Showers

    • 39
    • 57

    Rain Showers Likely

    • 40
    • 62

    Slight Chance Rain Showers

Today 22 May Grande Ronde Valley

Sunny. Highs in the upper 70s. Light wind.

Tonight 22 May Grande Ronde Valley

Mostly clear. Lows in the lower to mid 40s. North wind 5 to 10 Mph in the Evening, becoming light.

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La Grande/Union County Airport Temperature Statistics

May Temperature

La Grande/Union County Airport (0 miles)

  • Lowest 19 May, 2026

    33.1 °F

  • Average May

    57.7 °F

  • Highest 12 May, 2026

    91 °F

Climate (2021–Present)

La Grande/Union County Airport (0 miles)

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  • Average Low 2021–2026

    38.4 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    62.8 °F
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