Marietta Weather Forecast

    • 24
    • 42

    Becoming Sunny

    • 34
    • 48

    Mostly Sunny

    • 46
    • 56

    Mostly Cloudy

    • 58
    • 66

    Mostly Cloudy

    • 45
    • 70

    Partly Sunny

    • 51
    • 62

    Mostly Cloudy

Today 14 Dec Cass

Mostly sunny. Much cooler with Highs in the lower 40s. Northeast Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 14 Dec Cass

Mostly clear. Colder with Lows in the lower 20s. East Winds around 5 Mph.

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Marietta Temperature Statistics

December Temperature

Mount Pleasant, Mount Pleasant Regional Airport (24.9 miles)

  • Lowest 11 December, 2025

    29.3 °F

  • Average December

    41.7 °F

  • Highest 10 December, 2025

    65.8 °F

Climate (2020–Present)

Mount Pleasant, Mount Pleasant Regional Airport (24.9 miles)

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  • Average Low 2020–2025

    54.2 °F

  • Average 2020–2025

    64.7 °F

  • Average High 2020–2025

    76 °F
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