Umatilla National Forest Weather Forecast

    • 26
    • 43

    Rain

    • 27
    • 35

    Blizzard

    • 35
    • 40

    Rain/Snow

    • 25
    • 36

    Snow

    • 25
    • 31

    Chance Snow

    • 31
    • 34

    Snow Likely

Today 16 Dec Southern Blue Mountains of Oregon

Partly sunny. Highs in the upper 40s to mid 50s. Southwest wind 5 to 15 Mph in the afternoon. Gusts up to 30 Mph.

Tonight 16 Dec Southern Blue Mountains of Oregon

A chance of rain in the Evening, then rain overnight. Lows in the upper 20s to mid 30s. Windy. South wind 5 to 15 Mph with Gusts to around 40 Mph shifting to the southwest 20 to 30 Mph with Gusts to around 60 Mph overnight. Chance of precipitation near 100 percent. Rainfall Amounts up to a half of an inch possible.

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Umatilla National Forest Temperature Statistics

December Temperature

Grant County Regional Airport (35.4 miles)

  • Lowest 1 December, 2025

    18.3 °F

  • Average December

    40.5 °F

  • Highest 10 December, 2025

    57 °F

Climate (2020–Present)

Grant County Regional Airport (35.4 miles)

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  • Average Low 2020–2025

    39.2 °F

  • Average 2020–2025

    50.5 °F

  • Average High 2020–2025

    62.2 °F
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