Coulee Dam Weather Forecast

    • 60
    • 85

    Increasing Clouds

    • 63
    • 88

    Partly Sunny

    • 64
    • 90

    Mostly Cloudy

    • 63
    • 90

    Mostly Cloudy

    • 61
    • 87

    Partly Sunny

    • 61
    • 86

    Partly Sunny

Today 14 Aug Upper Columbia Basin

Partly cloudy in the Morning, becoming sunny. Highs in the 80s. North wind 5 to 10 Mph. Gusts up to 20 Mph in the morning.

Tonight 14 Aug Upper Columbia Basin

Partly cloudy. Lows in the mid 50s to lower 60s. North wind 5 to 10 Mph.

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Coulee Dam Temperature Statistics

August Temperature

Omak Airport (42.3 miles)

  • Lowest 3 August, 2026

    50.6 °F

  • Average August

    72.9 °F

  • Highest 6 August, 2026

    95.6 °F

Climate (2021–2026)

Omak Airport (42.3 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    51.8 °F

  • Average High 2021–2026

    62.9 °F
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