Coulee Dam Weather Forecast

    • 37
    • 42

    Rain

    • 36
    • 49

    Rain Likely

    • 37
    • 45

    Rain Likely

    • 28
    • 40

    Partly Sunny

    • 31
    • 37

    Mostly Cloudy

    • 33
    • 41

    Mostly Cloudy

Today 23 Dec Upper Columbia Basin

Mostly cloudy. A chance of rain in the afternoon. Highs in the upper 30s to lower 40s. Southeast wind 5 to 10 Mph. Chance of precipitation 20 percent.

Tonight 23 Dec Upper Columbia Basin

A chance of rain in the Evening, then rain likely overnight. Lows in the 30s. Northeast wind 5 to 15 Mph. Gusts up to 30 Mph overnight. Chance of precipitation 70 percent. Rainfall Amounts less than a tenth of an inch.

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Coulee Dam Temperature Statistics

December Temperature

Omak Airport (42.3 miles)

  • Lowest 20 December, 2025

    25 °F

  • Average December

    38.4 °F

  • Highest 9 December, 2025

    51.1 °F

Climate (2020–Present)

Omak Airport (42.3 miles)

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  • Average Low 2020–2025

    40.8 °F

  • Average 2020–2025

    51.9 °F

  • Average High 2020–2025

    62.9 °F
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