Grand Coulee Dam Airport Weather Forecast

    • 47
    • 70

    Mostly Cloudy

    • 50
    • 76

    Rain Showers

    • 45
    • 61

    Rain Showers Likely

    • 39
    • 60

    Chance Rain

    • 38
    • 59

    Slight Chance Rain

    • 42
    • 60

    Chance Rain

    • 38
    • 57

    Chance Rain

Today 25 Mar Upper Columbia Basin

Mostly sunny. Highs in the upper 60s to mid 70s. Southeast wind 5 to 10 Mph.

Tonight 25 Mar Upper Columbia Basin

Mostly cloudy. Lows in the mid to upper 40s. Northeast wind 5 to 10 Mph.

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Grand Coulee Dam Airport Temperature Statistics

March Temperature

Omak Airport (42.3 miles)

  • Lowest 14 March, 2025

    23.8 °F

  • Average March

    42 °F

  • Highest 2 March, 2025

    59.6 °F

Climate (2020–Present)

Omak Airport (42.3 miles)

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  • Average Low 2020–2025

    40.6 °F

  • Average 2020–2025

    51.6 °F

  • Average High 2020–2025

    62.4 °F
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