McNary Weather Forecast

    • 41
    • 55

    Rain

    • 45
    • 54

    Rain

    • 49
    • 60

    Rain Likely

    • 47
    • 58

    Rain

    • 47
    • 61

    Chance Rain

    • 42
    • 56

    Chance Rain

Today 6 Dec Lower Columbia Basin of Oregon

Mostly sunny. A 20 percent chance of rain in the afternoon. Highs in the lower to mid 50s. Very windy. Southwest wind 20 to 35 Mph. Gusts up to 45 Mph decreasing to 35 Mph in the afternoon.

Tonight 6 Dec Lower Columbia Basin of Oregon

Mostly cloudy. A chance of rain. Lows in the lower 40s. Breezy. Southwest wind 10 to 20 Mph. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an inch.

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McNary Temperature Statistics

December Temperature

Hermiston, Hermiston Municipal Airport (6.2 miles)

  • Lowest 1 December, 2025

    25 °F

  • Average December

    34.3 °F

  • Highest 4 December, 2025

    45 °F

Climate (2020–Present)

Hermiston, Hermiston Municipal Airport (6.2 miles)

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  • Average Low 2020–2025

    43 °F

  • Average 2020–2025

    55.3 °F

  • Average High 2020–2025

    67.6 °F
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