La Grande/Union County Airport Weather Forecast

    • 35
    • 64

    Increasing Clouds

    • 36
    • 68

    Partly Sunny

    • 37
    • 72

    Mostly Sunny

    • 41
    • 72

    Partly Sunny

    • 41
    • 72

    Partly Sunny

    • 38
    • 69

    Partly Sunny

Today 26 Sep Grande Ronde Valley

Mostly cloudy in the morning then clearing. Highs in the mid 60s. Light wind.

Tonight 26 Sep Grande Ronde Valley

Mostly cloudy. Lows in the mid to upper 30s. Light wind.

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La Grande/Union County Airport Temperature Statistics

September Temperature

La Grande/Union County Airport (0 miles)

  • Lowest 15 September, 2026

    36 °F

  • Average September

    59.2 °F

  • Highest 10 September, 2026

    89.1 °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

    50.5 °F

  • Average High 2021–2026

    62.7 °F
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