McNary Weather Forecast

    • 54
    • 62

    Chance Rain Showers

    • 53
    • 82

    Becoming Sunny

    • 55
    • 83

    Mostly Sunny

    • 56
    • 86

    Sunny

    • 54
    • 85

    Mostly Sunny

    • 52
    • 78

    Partly Sunny

    • 51
    • 76

    Partly Sunny

Today 17 Sep Lower Columbia Basin of Oregon

Mostly cloudy with a 50 percent chance of Showers. Highs in the lower to mid 70s. Light wind. Rainfall Amounts less than a tenth of an inch.

Tonight 17 Sep Lower Columbia Basin of Oregon

Mostly cloudy. A 50 percent chance of rain Showers in the evening. Lows in the mid to upper 50s. South wind 5 to 10 Mph. Rainfall Amounts less than a tenth of an inch.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

McNary Temperature Statistics

September Temperature

Hermiston, Hermiston Municipal Airport (6.2 miles)

  • Lowest 4 September, 2026

    42.7 °F

  • Average September

    63.5 °F

  • Highest 10 September, 2026

    90.6 °F

Climate (2021–2026)

Hermiston, Hermiston Municipal Airport (6.2 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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