Summer Falls State Park Weather Forecast

    • 47
    • 77

    Mostly Sunny

    • 53
    • 84

    Increasing Clouds

    • 43
    • 70

    Mostly Cloudy

    • 44
    • 71

    Mostly Sunny

    • 47
    • 76

    Mostly Sunny

    • 50
    • 81

    Mostly Sunny

    • 51
    • 83

    Mostly Sunny

Today 1 May Upper Columbia Basin

Sunny. Highs in the mid to upper 70s. East wind 5 to 10 Mph.

Tonight 1 May Upper Columbia Basin

Mostly clear. Lows in the mid to upper 40s. East wind 5 to 10 Mph.

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Summer Falls State Park Temperature Statistics

May Temperature

Ephrata, Ephrata Municipal Airport (16.8 miles)

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  • Average May

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Climate (2020–Present)

Ephrata, Ephrata Municipal Airport (16.8 miles)

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  • Average Low 2020–2025

    42 °F

  • Average 2020–2025

    53.1 °F

  • Average High 2020–2025

    63.3 °F
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