Washington County State Lake Weather Forecast

    • 45
    • 77

    Becoming Sunny

    • 47
    • 79

    Mostly Sunny

    • 48
    • 82

    Sunny

    • 50
    • 87

    Mostly Sunny

    • 32
    • 61

    Breezy

    • 36
    • 55

    Mostly Cloudy

    • 40
    • 64

    Partly Sunny

Today 18 Mar Washington

Sunny. Much warmer with Highs in the upper 70s. West Winds 5 to 10 Mph.

Tonight 18 Mar Washington

Mostly clear. Not as cool with Lows in the mid 40s. Southwest Winds 5 to 10 Mph, becoming west after midnight.

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Washington County State Lake Temperature Statistics

March Temperature

Marysville Municipal Airport (26.1 miles)

  • Lowest 16 March, 2026

    10.4 °F

  • Average March

    44.9 °F

  • Highest 9 March, 2026

    80.6 °F

Climate (2021–Present)

Marysville Municipal Airport (26.1 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    54.8 °F

  • Average High 2021–2026

    66.3 °F
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