Washington County State Lake Weather Forecast

    • 48
    • 64

    Becoming Sunny

    • 52
    • 67

    Mostly Sunny

    • 54
    • 72

    Mostly Sunny

    • 58
    • 75

    Mostly Sunny

    • 59
    • 74

    Mostly Cloudy

    • 52
    • 70

    Chance Rain Showers

Today 19 Oct Washington

Mostly cloudy this Morning, then becoming mostly sunny. Highs in the mid 60s. South Winds 5 to 10 Mph.

Tonight 19 Oct Washington

Mostly clear. Lows in the upper 40s. Southeast Winds around 5 Mph.

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  • Temperature Real-Time

Washington County State Lake Temperature Statistics

October Temperature

Marysville Municipal Airport (26.1 miles)

  • Lowest 16 October, 2026

    35.6 °F

  • Average October

    64.4 °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

    44 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    66.6 °F
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