Washington County State Lake Weather Forecast

    • 62
    • 71

    Chance Thunderstorms

    • 66
    • 92

    Thunderstorms

    • 59
    • 68

    Thunderstorms

    • 65
    • 76

    Thunderstorms Likely

    • 65
    • 78

    Chance Rain Showers

    • 63
    • 80

    Chance Rain Showers

    • 58
    • 74

    Chance Rain Showers

Today 13 Sep Washington

Mostly cloudy with a slight chance of Showers and Thunderstorms. Near steady temperature in the lower 70s. East Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent.

Tonight 13 Sep Washington

Mostly cloudy. A slight chance of Showers and Thunderstorms this Evening, then a chance of Showers and Thunderstorms after midnight. Lows in the lower 60s. East Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Washington County State Lake Temperature Statistics

September Temperature

Marysville Municipal Airport (26.1 miles)

  • Lowest 11 September, 2026

    64.4 °F

  • Average September

    82.1 °F

  • Highest 8 September, 2026

    100.4 °F

Climate (2021–2026)

Marysville Municipal Airport (26.1 miles)

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    66.7 °F
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