Washington County State Lake Weather Forecast

    • 62
    • 74

    Rain Showers Likely

    • 61
    • 70

    Rain Showers Likely

    • 57
    • 68

    Rain Showers Likely

    • 55
    • 73

    Partly Sunny

    • 43
    • 66

    Partly Sunny

    • 46
    • 65

    Mostly Sunny

    • 49
    • 72

    Mostly Sunny

Today 30 Aug Washington

Numerous Showers and scattered Thunderstorms. Highs in the mid 70s. Southeast Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 30 Aug Washington

A chance of Thunderstorms. Showers likely. Lows in the lower 60s. Southeast Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Washington County State Lake Temperature Statistics

August Temperature

Marysville Municipal Airport (26.1 miles)

  • Lowest 2 August, 2025

    55.4 °F

  • Average August

    75.6 °F

  • Highest 8 August, 2025

    96.8 °F

Climate (2020–Present)

Marysville Municipal Airport (26.1 miles)

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  • Average Low 2020–2025

    43.3 °F

  • Average 2020–2025

    54.4 °F

  • Average High 2020–2025

    65.8 °F
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