Coulee City Weather Forecast

    • 49
    • 68

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 56
    • 76

    Partly Sunny

    • 58
    • 78

    Partly Sunny

    • 59
    • 82

    Mostly Sunny

    • 58
    • 84

    Mostly Sunny

Today 29 Apr Upper Columbia Basin

Sunny. Highs in the upper 60s to lower 70s. East wind 5 to 10 Mph in the Morning, becoming light and variable.

Tonight 29 Apr Upper Columbia Basin

Mostly clear. Lows in the 40s. Light Wind, becoming northeast 5 to 10 Mph overnight.

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Coulee City Temperature Statistics

April Temperature

Ephrata, Ephrata Municipal Airport (23 miles)

  • Lowest 17 April, 2026

    28.7 °F

  • Average April

    51.8 °F

  • Highest 6 April, 2026

    77.6 °F

Climate (2021–Present)

Ephrata, Ephrata Municipal Airport (23 miles)

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  • Average Low 2021–2026

    42.5 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    63.9 °F
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