Heppner Weather Forecast

    • 57
    • 77

    Mostly Sunny

    • 57
    • 82

    Mostly Sunny

    • 58
    • 81

    Partly Sunny

    • 57
    • 82

    Partly Sunny

    • 57
    • 79

    Partly Sunny

    • 54
    • 76

    Mostly Sunny

    • 57
    • 79

    Mostly Sunny

Today 16 Sep Foothills of the Southern Blue Mountains of Oregon

Sunny. Highs in the mid to upper 70s. East wind 5 to 10 Mph. Gusts up to 20 Mph in the afternoon.

Tonight 16 Sep Foothills of the Southern Blue Mountains of Oregon

Mostly clear. Lows in the 50s. East wind 5 to 10 Mph. Gusts up to 20 Mph in the evening.

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Heppner Temperature Statistics

September Temperature

Hermiston, Hermiston Municipal Airport (35.4 miles)

  • Lowest 13 September, 2025

    54 °F

  • Average September

    73.6 °F

  • Highest 2 September, 2025

    98.1 °F

Climate (2020–Present)

Hermiston, Hermiston Municipal Airport (35.4 miles)

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  • Average Low 2020–2025

    42.9 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    67.6 °F
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