Umatilla National Forest Weather Forecast

    • 46
    • 72

    Mostly Sunny

    • 40
    • 60

    Partly Sunny

    • 44
    • 63

    Mostly Sunny

    • 51
    • 75

    Partly Sunny

    • 46
    • 68

    Mostly Cloudy

    • 45
    • 61

    Chance Rain Showers

Today 28 Aug Southern Blue Mountains of Oregon

Sunny. Highs in the mid 70s to lower 80s. Gusts up to 20 Mph in the afternoon.

Tonight 28 Aug Southern Blue Mountains of Oregon

Mostly clear. Lows in the 40s.

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Umatilla National Forest Temperature Statistics

August Temperature

Grant County Regional Airport (35.4 miles)

  • Lowest 3 August, 2026

    44.2 °F

  • Average August

    73.5 °F

  • Highest 7 August, 2026

    99.5 °F

Climate (2021–2026)

Grant County Regional Airport (35.4 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    50.3 °F

  • Average High 2021–2026

    62.1 °F
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