Billy Clapp Lake Weather Forecast

    • 47
    • 75

    Decreasing Clouds

    • 53
    • 84

    Partly Sunny

    • 52
    • 86

    Chance Rain Showers

    • 46
    • 74

    Chance Rain Showers

    • 45
    • 72

    Chance Rain Showers

    • 45
    • 74

    Slight Chance Rain Showers

Today 30 Aug Upper Columbia Basin

Sunny in the Morning, becoming partly cloudy. Highs in the lower to mid 70s. Southwest wind 5 to 15 Mph with Gusts up to 25 Mph.

Tonight 30 Aug Upper Columbia Basin

Mostly clear. Lows in the mid 40s to lower 50s. Southwest wind 5 to 10 Mph in the Evening, becoming light and variable.

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Billy Clapp Lake Temperature Statistics

August Temperature

Ephrata, Ephrata Municipal Airport (16.8 miles)

  • Lowest 2 August, 2026

    52.6 °F

  • Average August

    75.3 °F

  • Highest 21 August, 2026

    102.7 °F

Climate (2021–2026)

Ephrata, Ephrata Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    53.4 °F

  • Average High 2021–2026

    63.9 °F
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