Grand Coulee Dam Airport Weather Forecast

    • 62
    • 88

    Increasing Clouds

    • 65
    • 85

    Increasing Clouds

    • 61
    • 79

    Chance Rain Showers

    • 61
    • 85

    Chance Rain Showers

    • 64
    • 91

    Sunny

    • 62
    • 94

    Sunny

    • 61
    • 92

    Mostly Sunny

Today 19 Jul Upper Columbia Basin

Partly cloudy. Highs in the mid to upper 80s. Southwest wind 5 to 15 Mph with Gusts up to 25 Mph.

Tonight 19 Jul Upper Columbia Basin

Mostly cloudy. Lows in the mid 50s to lower 60s. West wind 5 to 15 Mph with Gusts up to 25 Mph.

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Grand Coulee Dam Airport Temperature Statistics

July Temperature

Omak Airport (42.3 miles)

  • Lowest 11 July, 2025

    52.6 °F
  • Average July

    76.9 °F
  • Highest 13 July, 2025

    103.6 °F

Climate (2020–Present)

Omak Airport (42.3 miles)

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  • Average Low 2020–2025

    40.6 °F
  • Average 2020–2025

    51.7 °F
  • Average High 2020–2025

    62.7 °F
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