Umatilla National Forest Weather Forecast

    • 38
    • 49

    Rain Showers

    • 38
    • 51

    Chance Rain Showers

    • 39
    • 55

    Chance Rain Showers

    • 41
    • 58

    Rain Showers Likely

    • 41
    • 56

    Chance Rain Showers

    • 44
    • 64

    Partly Sunny

Today 3 Sep Southern Blue Mountains of Oregon

Mostly cloudy with a 50 percent chance of rain Showers. Highs in the mid 50s to lower 60s. Rainfall Amounts less than a quarter of an inch.

Tonight 3 Sep Southern Blue Mountains of Oregon

Mostly cloudy with a 50 percent chance of rain Showers. Lows in the mid 30s to lower 40s. Rainfall Amounts less than a quarter of an inch.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Umatilla National Forest Temperature Statistics

September Temperature

Grant County Regional Airport (35.4 miles)

  • Lowest 1 September, 2026

    55.9 °F

  • Average September

    68.9 °F

  • Highest 1 September, 2026

    83.7 °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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