Washington County State Lake Weather Forecast

    • 23
    • 54

    Increasing Clouds

    • 27
    • 39

    Mostly Cloudy

    • 23
    • 38

    Mostly Cloudy

    • 31
    • 45

    Partly Sunny

    • 32
    • 57

    Partly Sunny

    • 31
    • 55

    Partly Sunny

Today 31 Dec Washington

Sunny. Highs in the mid 50s. West Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 31 Dec Washington

Mostly clear in the Evening, then becoming mostly cloudy. Cold with Lows in the mid 20s. North Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming northeast after midnight.

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  • Temperature Real-Time

Washington County State Lake Temperature Statistics

December Temperature

Marysville Municipal Airport (26.1 miles)

  • Lowest 14 December, 2025

    5 °F

  • Average December

    34.4 °F

  • Highest 23 December, 2025

    62.6 °F

Climate (2020–Present)

Marysville Municipal Airport (26.1 miles)

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  • Average Low 2020–2025

    43.6 °F

  • Average 2020–2025

    54.7 °F

  • Average High 2020–2025

    66 °F
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