Washington County Lake Weather Forecast

    • 72
    • 98

    Hot

    • 66
    • 95

    Mostly Cloudy

    • 60
    • 82

    Rain Showers Likely

    • 55
    • 74

    Partly Sunny

    • 55
    • 75

    Partly Sunny

    • 57
    • 76

    Partly Sunny

Today 19 Sep Washington

Sunny, hot with Highs in the upper 90s. Southwest Winds around 5 Mph.

Tonight 19 Sep Washington

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the lower 70s. South Winds around 5 Mph.

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Washington County Lake Temperature Statistics

September Temperature

Centralia Municipal Airport (21.1 miles)

  • Lowest 8 September, 2026

    55.4 °F

  • Average September

    78.8 °F

  • Highest 5 September, 2026

    102.6 °F

Climate (2021–2026)

Centralia Municipal Airport (21.1 miles)

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  • Average Low 2021–2026

    49.9 °F

  • Average 2021–2026

    59.8 °F

  • Average High 2021–2026

    70.1 °F
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