Umatilla National Forest Weather Forecast

    • 55
    • 76

    Increasing Clouds

    • 46
    • 71

    Chance Rain Showers

    • 46
    • 56

    Rain Showers

    • 43
    • 53

    Rain Showers Likely

    • 44
    • 57

    Chance Rain Showers

    • 47
    • 63

    Partly Sunny

Today 31 Aug Southern Blue Mountains of Oregon

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

Tonight 31 Aug Southern Blue Mountains of Oregon

Mostly clear in the Evening, becoming mostly cloudy. Lows in the lower to mid 50s.

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  • Temperature Real-Time

Umatilla National Forest Temperature Statistics

August Temperature

Grant County Regional Airport (35.4 miles)

  • Lowest 3 August, 2026

    44.2 °F

  • Average August

    72.8 °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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