McNary Weather Forecast

    • 36
    • 68

    Mostly Sunny

    • 49
    • 62

    Chance Rain Showers

    • 41
    • 64

    Chance Rain Showers

    • 37
    • 63

    Mostly Sunny

    • 37
    • 63

    Partly Sunny

    • 40
    • 63

    Partly Sunny

    • 44
    • 67

    Chance Rain Showers

Today 17 Oct Lower Columbia Basin of Oregon

Sunny. Highs in the mid to upper 60s. Windy. Southwest wind 15 to 25 Mph with Gusts to around 40 Mph.

Tonight 17 Oct Lower Columbia Basin of Oregon

Mostly clear. Lows in the mid to upper 30s. Windy. West wind 15 to 25 Mph with Gusts to around 35 Mph shifting to the south 5 to 10 Mph overnight.

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McNary Temperature Statistics

October Temperature

Hermiston, Hermiston Municipal Airport (6.2 miles)

  • Lowest 14 October, 2025

    30 °F

  • Average October

    54.1 °F

  • Highest 8 October, 2025

    75.9 °F

Climate (2020–Present)

Hermiston, Hermiston Municipal Airport (6.2 miles)

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  • Average Low 2020–2025

    42.9 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    67.5 °F
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