Sullivan Lake Weather Forecast

    • 57
    • 72

    Rain Showers Likely

    • 61
    • 80

    Chance Rain Showers

    • 61
    • 87

    Mostly Sunny

    • 59
    • 90

    Sunny

    • 57
    • 87

    Mostly Sunny

    • 60
    • 85

    Mostly Sunny

    • 60
    • 87

    Mostly Sunny

Today 21 Jul Waterville Plateau

Rain Showers likely and a chance of Thunderstorms. Highs in the lower to mid 70s. Chance of precipitation 70 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 21 Jul Waterville Plateau

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then a chance of rain Showers overnight. Lows in the mid to upper 50s. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sullivan Lake Temperature Statistics

July Temperature

Ephrata, Ephrata Municipal Airport (28.6 miles)

  • Lowest 3 July, 2025

    57.7 °F

  • Average July

    80.4 °F

  • Highest 13 July, 2025

    103.6 °F

Climate (2020–Present)

Ephrata, Ephrata Municipal Airport (28.6 miles)

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  • Average Low 2020–2025

    42.1 °F

  • Average 2020–2025

    53.3 °F

  • Average High 2020–2025

    63.6 °F
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