La Grande/Union County Airport Weather Forecast

    • 38
    • 72

    Rain Showers Likely

    • 41
    • 72

    Rain Showers

    • 37
    • 69

    Rain Showers Likely

    • 42
    • 77

    Partly Sunny

    • 45
    • 83

    Partly Sunny

    • 47
    • 85

    Chance Rain Showers

Today 5 Sep Grande Ronde Valley

Partly cloudy. A 20 percent chance of Showers and Thunderstorms in the afternoon. Highs in the lower 70s. Light wind.

Tonight 5 Sep Grande Ronde Valley

Partly cloudy. A 20 percent chance of rain Showers in the evening. Lows in the upper 30s to lower 40s. Light wind.

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La Grande/Union County Airport Temperature Statistics

September Temperature

La Grande/Union County Airport (0 miles)

  • Lowest 1 September, 2026

    50 °F

  • Average September

    64.4 °F

  • Highest 1 September, 2026

    82 °F

Climate (2021–2026)

La Grande/Union County Airport (0 miles)

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  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    62.8 °F
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