Umatilla National Forest Weather Forecast

    • 31
    • 59

    Snow

    • 28
    • 33

    Snow

    • 26
    • 39

    Chance Snow

    • 25
    • 40

    Slight Chance Snow

    • 28
    • 42

    Slight Chance Snow

    • 31
    • 44

    Partly Sunny

    • 33
    • 47

    Chance Snow

Today 21 Apr Southern Blue Mountains of Oregon

Rain Showers likely and a chance of Thunderstorms. Highs in the 60s. Chance of precipitation 70 percent. Rainfall Amounts less than a quarter of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 21 Apr Southern Blue Mountains of Oregon

Rain Showers and a chance of Thunderstorms in the Evening, then rain and high mountain snow overnight. High mountain snow accumulation up to 1 inch. Lows in the 30s. West wind 5 to 15 Mph. Gusts up to 30 Mph increasing to 40 Mph overnight. Chance of precipitation near 100 percent.

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Umatilla National Forest Temperature Statistics

April Temperature

Grant County Regional Airport (35.4 miles)

  • Lowest 17 April, 2026

    25.2 °F

  • Average April

    46.9 °F

  • Highest 6 April, 2026

    73.6 °F

Climate (2021–Present)

Grant County Regional Airport (35.4 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    62.3 °F
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