Sun Lakes State Park Weather Forecast

    • 36
    • 46

    Increasing Clouds

    • 33
    • 47

    Mostly Cloudy

    • 31
    • 36

    Mostly Cloudy

    • 30
    • 37

    Partly Sunny

    • 29
    • 37

    Mostly Sunny

    • 29
    • 42

    Partly Sunny

Today 12 Jan Upper Columbia Basin

Partly sunny. Highs in the mid 40s to lower 50s. South wind 5 to 15 Mph with Gusts up to 25 Mph.

Tonight 12 Jan Upper Columbia Basin

Mostly cloudy. Lows in the mid to upper 30s. South wind 5 to 15 Mph.

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Sun Lakes State Park Temperature Statistics

January Temperature

Ephrata, Ephrata Municipal Airport (20.5 miles)

  • Lowest 1 January, 2026

    19.9 °F

  • Average January

    32.8 °F

  • Highest 8 January, 2026

    44.1 °F

Climate (2021–Present)

Ephrata, Ephrata Municipal Airport (20.5 miles)

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  • Average Low 2021–2026

    42.4 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    63.8 °F
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