Coulee Lake Weather Forecast

    • 66
    • 95

    Mostly Sunny

    • 66
    • 99

    Hot

    • 61
    • 94

    Mostly Sunny

    • 59
    • 87

    Mostly Sunny

    • 61
    • 90

    Mostly Sunny

    • 62
    • 91

    Mostly Sunny

Today 30 Jun Upper Columbia Basin

Sunny. Highs in the 90s. North wind 5 to 10 Mph.

Tonight 30 Jun Upper Columbia Basin

Mostly clear. Lows in the lower to mid 60s. Northwest wind 5 to 10 Mph.

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Coulee Lake Temperature Statistics

June Temperature

Ephrata, Ephrata Municipal Airport (23 miles)

  • Lowest 21 June, 2025

    47.6 °F

  • Average June

    72.7 °F

  • Highest 9 June, 2025

    101.6 °F

Climate (2020–Present)

Ephrata, Ephrata Municipal Airport (23 miles)

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  • Average Low 2020–2025

    42 °F

  • Average 2020–2025

    53.2 °F

  • Average High 2020–2025

    63.5 °F
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