La Grande/Union County Airport Weather Forecast

    • 51
    • 86

    Chance Rain Showers

    • 43
    • 72

    Partly Sunny

    • 48
    • 76

    Mostly Sunny

    • 55
    • 86

    Mostly Sunny

    • 51
    • 85

    Slight Chance Thunderstorms

    • 53
    • 83

    Sunny

Today 25 May Grande Ronde Valley

Sunny. Highs in the mid to upper 80s. Light Wind, becoming south 5 to 15 Mph in the afternoon.

Tonight 25 May Grande Ronde Valley

Mostly cloudy with a chance of Showers and Thunderstorms. Some Thunderstorms may produce gusty Winds. Lows in the lower 50s. West wind 5 to 15 Mph. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

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La Grande/Union County Airport Temperature Statistics

May Temperature

La Grande/Union County Airport (0 miles)

  • Lowest 1 May, 2025

    32.6 °F

  • Average May

    53.5 °F

  • Highest 9 May, 2025

    86.6 °F

Climate (2020–Present)

La Grande/Union County Airport (0 miles)

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  • Average Low 2020–2025

    37.7 °F

  • Average 2020–2025

    50 °F

  • Average High 2020–2025

    62.1 °F
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