La Grande Reservoir Weather Forecast

    • 49
    • 76

    Mostly Sunny

    • 50
    • 77

    Mostly Sunny

    • 48
    • 77

    Partly Sunny

    • 47
    • 75

    Partly Sunny

    • 44
    • 67

    Mostly Sunny

    • 50
    • 73

    Mostly Sunny

Today 17 Sep Southern Blue Mountains of Oregon

Sunny. Highs in the upper 70s to lower 80s.

Tonight 17 Sep Southern Blue Mountains of Oregon

Mostly clear. Lows in the upper 40s to mid 50s.

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La Grande Reservoir Temperature Statistics

September Temperature

La Grande/Union County Airport (13.7 miles)

  • Lowest 13 September, 2025

    46 °F

  • Average September

    68.3 °F

  • Highest 2 September, 2025

    100.9 °F

Climate (2020–Present)

La Grande/Union County Airport (13.7 miles)

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  • Average Low 2020–2025

    37.9 °F

  • Average 2020–2025

    50.2 °F

  • Average High 2020–2025

    62.3 °F
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