Grand Coulee Weather Forecast

    • 30
    • 32

    Snow Likely

    • 32
    • 37

    Snow

    • 20
    • 36

    Partly Sunny

    • 22
    • 33

    Chance Snow

    • 20
    • 32

    Chance Snow

    • 12
    • 29

    Chance Snow

Today 30 Jan Upper Columbia Basin

Partly sunny. Highs in the mid 30s to lower 40s. Light Wind, becoming southeast 5 to 10 Mph in the afternoon.

Tonight 30 Jan Upper Columbia Basin

Cloudy. A chance of rain or snow overnight. Lows in the upper 20s to lower 30s. Light Wind, becoming southeast 5 to 10 Mph overnight. Chance of precipitation 50 percent.

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Grand Coulee Temperature Statistics

January Temperature

Omak Airport (42.9 miles)

  • Lowest 22 January, 2025

    9.8 °F

  • Average January

    27.7 °F

  • Highest 6 January, 2025

    40.6 °F

Climate (2020–Present)

Omak Airport (42.9 miles)

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  • Average Low 2020–2025

    40.7 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    62.6 °F
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