Marietta Weather Forecast

    • 57
    • 83

    Partly Sunny

    • 56
    • 83

    Partly Sunny

    • 57
    • 86

    Mostly Sunny

    • 59
    • 88

    Mostly Sunny

    • 65
    • 88

    Mostly Cloudy

    • 62
    • 84

    Slight Chance Thunderstorms

Today 16 Sep Washington

Partly sunny. Highs in the lower 80s. East Winds around 5 Mph.

Tonight 16 Sep Washington

Partly cloudy. Lows in the mid 50s. East Winds around 5 Mph.

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Marietta Temperature Statistics

September Temperature

Parkersburg, Mid-Ohio Valley Regional Airport (4.3 miles)

  • Lowest 8 September, 2025

    45 °F

  • Average September

    64.1 °F

  • Highest 13 September, 2025

    84.9 °F

Climate (2020–Present)

Parkersburg, Mid-Ohio Valley Regional Airport (4.3 miles)

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  • Average Low 2020–2025

    45.3 °F

  • Average 2020–2025

    55.5 °F

  • Average High 2020–2025

    66.2 °F
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