Washington County State Lake Weather Forecast

    • 46
    • 73

    Increasing Clouds

    • 44
    • 73

    Partly Sunny

    • 48
    • 79

    Rain Showers Likely

    • 45
    • 71

    Mostly Sunny

    • 56
    • 82

    Mostly Sunny

    • 54
    • 87

    Mostly Sunny

Today 7 May Washington

Sunny, warmer with Highs in the mid 70s. Southwest Winds 15 to 20 Mph.

Tonight 7 May Washington

Mostly cloudy. A chance of Sprinkles in the Evening, then a chance of Showers after midnight. Not as cool with Lows in the upper 40s. South 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

May Temperature

Marysville Municipal Airport (26.1 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    60.5 °F

  • Highest 4 May, 2026

    86 °F

Climate (2021–Present)

Marysville Municipal Airport (26.1 miles)

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  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    55 °F

  • Average High 2021–2026

    66.6 °F
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