Heppner Weather Forecast

    • 45
    • 59

    Rain Showers Likely

    • 46
    • 67

    Mostly Sunny

    • 47
    • 65

    Mostly Cloudy

    • 49
    • 69

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

Today 13 Sep Foothills of the Southern Blue Mountains of Oregon

Mostly cloudy with a 50 percent chance of rain Showers. Highs in the upper 50s to lower 60s. Windy. West wind 15 to 25 Mph with Gusts to around 40 Mph. Rainfall Amounts less than a tenth of an inch.

Tonight 13 Sep Foothills of the Southern Blue Mountains of Oregon

Cloudy with a 50 percent chance of rain Showers in the Evening, then mostly clear overnight. Lows in the 40s. Breezy. Southwest wind 10 to 20 Mph with Gusts to around 30 Mph. Rainfall Amounts less than a tenth of an inch.

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Heppner Temperature Statistics

September Temperature

Hermiston, Hermiston Municipal Airport (35.4 miles)

  • Lowest 4 September, 2026

    42.7 °F

  • Average September

    64.8 °F

  • Highest 10 September, 2026

    90 °F

Climate (2021–2026)

Hermiston, Hermiston Municipal Airport (35.4 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    67.5 °F
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