Grand Coulee Weather Forecast

    • 62
    • 90

    Increasing Clouds

    • 65
    • 97

    Mostly Cloudy

    • 57
    • 91

    Breezy

    • 57
    • 87

    Sunny

    • 60
    • 90

    Mostly Sunny

    • 62
    • 93

    Mostly Sunny

Today 14 Jun Upper Columbia Basin

Sunny. Highs in the mid to upper 80s. Northeast wind 5 to 15 Mph with Gusts up to 20 Mph.

Tonight 14 Jun Upper Columbia Basin

Mostly clear. Lows in the mid 50s to lower 60s. Northeast wind 5 to 10 Mph in the Evening, becoming light and variable.

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Grand Coulee Temperature Statistics

June Temperature

Omak Airport (42.9 miles)

  • Lowest 7 June, 2026

    35.7 °F

  • Average June

    61.7 °F

  • Highest 3 June, 2026

    80.7 °F

Climate (2021–Present)

Omak Airport (42.9 miles)

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  • Average Low 2021–2026

    40.9 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    63 °F
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