Riverside Weather Forecast

    • 49
    • 85

    Increasing Clouds

    • 46
    • 73

    Mostly Cloudy

    • 44
    • 70

    Rain Showers Likely

    • 42
    • 65

    Chance Rain Showers

    • 42
    • 72

    Mostly Sunny

    • 44
    • 72

    Mostly Sunny

Today 10 Sep Foothills of the Northern Blue Mountains of Oregon

Sunny. Patchy blowing dust in the afternoon. Highs in the lower to mid 80s. Breezy. Southwest wind 10 to 20 Mph. Gusts up to 20 Mph increasing to 35 Mph in the afternoon.

Tonight 10 Sep Foothills of the Northern Blue Mountains of Oregon

Patchy blowing dust in the evening. Mostly cloudy with a 20 percent chance of rain Showers in the Evening, then mostly clear overnight. Lows in the upper 40s to lower 50s. Windy. Southwest wind 15 to 25 Mph with Gusts to around 35 Mph.

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  • Temperature Real-Time

Riverside Temperature Statistics

September Temperature

Eastern Oregon Regional Airport at Pendleton (4.3 miles)

  • Lowest 4 September, 2026

    45.6 °F

  • Average September

    61.6 °F

  • Highest 1 September, 2026

    82.7 °F

Climate (2021–2026)

Eastern Oregon Regional Airport at Pendleton (4.3 miles)

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  • Average Low 2021–2026

    43.1 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    65.6 °F
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