Washington County State Lake Weather Forecast

    • 62
    • 91

    Mostly Sunny

    • 56
    • 81

    Rain Showers

    • 54
    • 66

    Rain Showers Likely

    • 47
    • 66

    Slight Chance Rain Showers

    • 36
    • 59

    Mostly Sunny

    • 42
    • 61

    Mostly Sunny

Today 12 Oct Washington

Sunny. Highs in the lower 90s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 12 Oct Washington

Mostly clear with a slight chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the mid 60s. South Winds 10 to 15 Mph, becoming northeast 5 to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Washington County State Lake Temperature Statistics

October Temperature

Marysville Municipal Airport (26.1 miles)

  • Lowest 5 October, 2026

    41 °F

  • Average October

    65.5 °F

  • Highest 7 October, 2026

    87.8 °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

    66.6 °F
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