Umatilla National Forest Weather Forecast

    • 59
    • 80

    Patchy Smoke

    • 62
    • 83

    Mostly Sunny

    • 63
    • 83

    Mostly Cloudy

    • 51
    • 76

    Mostly Sunny

    • 51
    • 73

    Mostly Sunny

    • 56
    • 78

    Partly Sunny

Today 19 Aug Southern Blue Mountains of Oregon

Sunny. Patchy smoke in the morning. Highs in the mid 80s to lower 90s.

Tonight 19 Aug Southern Blue Mountains of Oregon

Mostly clear. Patchy smoke overnight. Lows in the mid 50s to lower 60s.

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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

    71.9 °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 °F

  • Average 2021–2026

    50.2 °F

  • Average High 2021–2026

    62 °F
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