Williams Lake Weather Forecast

    • 37
    • 44

    Mostly Cloudy

    • 35
    • 54

    Rain

    • 38
    • 50

    Rain

    • 32
    • 48

    Chance Rain/Snow

    • 30
    • 39

    Rain/Snow Likely

    • 27
    • 40

    Chance Rain/Snow

Today 14 Dec Upper Columbia Basin

Patchy fog in the morning. Mostly cloudy. Highs in the mid 40s to lower 50s. South wind 5 to 10 Mph.

Tonight 14 Dec Upper Columbia Basin

Mostly cloudy. A chance of rain overnight. Lows in the upper 30s to lower 40s. Southeast wind 5 to 10 Mph. Chance of precipitation 40 percent. Rainfall Amounts less than a tenth of an inch.

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Williams Lake Temperature Statistics

December Temperature

Ephrata, Ephrata Municipal Airport (15.5 miles)

  • Lowest 2 December, 2025

    26.1 °F

  • Average December

    40.5 °F

  • Highest 10 December, 2025

    64 °F

Climate (2020–Present)

Ephrata, Ephrata Municipal Airport (15.5 miles)

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  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    53.5 °F

  • Average High 2020–2025

    63.8 °F
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