Washington County State Lake Weather Forecast

    • 67
    • 91

    Chance Thunderstorms

    • 67
    • 88

    Slight Chance Thunderstorms

    • 66
    • 88

    Chance Thunderstorms

    • 65
    • 89

    Slight Chance Thunderstorms

    • 68
    • 90

    Slight Chance Thunderstorms

    • 67
    • 93

    Chance Thunderstorms

Today 5 Jul Washington

Sunny. Highs in the lower 90s. West Winds 5 to 10 Mph.

Tonight 5 Jul Washington

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Humid with Lows in the upper 60s. North Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Washington County State Lake Temperature Statistics

July Temperature

Marysville Municipal Airport (26.1 miles)

  • Lowest 1 July, 2025

    59 °F

  • Average July

    78.5 °F

  • Highest 2 July, 2025

    91.4 °F

Climate (2020–Present)

Marysville Municipal Airport (26.1 miles)

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  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    54.4 °F

  • Average High 2020–2025

    65.8 °F
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