Island City Weather Forecast

    • 52
    • 92

    Mostly Sunny

    • 54
    • 92

    Mostly Sunny

    • 59
    • 96

    Partly Sunny

    • 58
    • 95

    Mostly Cloudy

    • 50
    • 87

    Mostly Sunny

    • 50
    • 86

    Mostly Sunny

Today 18 Aug Grande Ronde Valley

Sunny. Highs in the lower 90s. Light wind.

Tonight 18 Aug Grande Ronde Valley

Mostly clear. Lows in the upper 40s to lower 50s. Northwest wind 5 to 10 Mph with Gusts to around 20 Mph in the Evening, becoming light.

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Island City Temperature Statistics

August Temperature

La Grande/Union County Airport (3.7 miles)

  • Lowest 5 August, 2026

    43 °F

  • Average August

    70.4 °F

  • Highest 7 August, 2026

    99 °F

Climate (2021–2026)

La Grande/Union County Airport (3.7 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    62.6 °F
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