La Grande Reservoir Weather Forecast

    • 42
    • 66

    Increasing Clouds

    • 43
    • 63

    Rain Showers

    • 43
    • 62

    Chance Rain Showers

    • 45
    • 68

    Mostly Sunny

    • 47
    • 72

    Mostly Sunny

    • 45
    • 72

    Mostly Sunny

    • 43
    • 68

    Mostly Sunny

Today 16 Sep Southern Blue Mountains of Oregon

Sunny. Highs in the mid 60s to lower 70s.

Tonight 16 Sep Southern Blue Mountains of Oregon

Mostly clear. Lows in the 40s. Gusts up to 25 Mph in the evening.

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  • Temperature Real-Time

La Grande Reservoir Temperature Statistics

September Temperature

La Grande/Union County Airport (13.7 miles)

  • Lowest 4 September, 2026

    39 °F

  • Average September

    58.1 °F

  • Highest 10 September, 2026

    89.1 °F

Climate (2021–2026)

La Grande/Union County Airport (13.7 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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