Umatilla National Forest Weather Forecast

    • 53
    • 71

    Chance Rain Showers

    • 53
    • 71

    Chance Rain Showers

    • 54
    • 73

    Rain Showers Likely

    • 56
    • 75

    Mostly Cloudy

    • 56
    • 75

    Mostly Cloudy

    • 51
    • 72

    Chance Rain Showers

Today 13 Aug Southern Blue Mountains of Oregon

Sunny. Areas of smoke in the Morning, then patchy smoke in the afternoon. Highs in the mid 70s to lower 80s. Gusts up to 20 Mph in the afternoon.

Tonight 13 Aug Southern Blue Mountains of Oregon

Partly cloudy with a chance of Showers and Thunderstorms. Patchy smoke. Lows in the upper 40s to upper 50s. Gusts up to 20 Mph in the evening. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

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  • Temperature Forecast NOAA

  • 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

    72.4 °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

    50.3 °F

  • Average High 2021–2026

    62.1 °F
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