Marietta Weather Forecast

    • 71
    • 94

    Chance Thunderstorms

    • 72
    • 91

    Chance Thunderstorms

    • 70
    • 91

    Slight Chance Rain Showers

    • 66
    • 86

    Slight Chance Thunderstorms

    • 70
    • 90

    Chance Rain Showers

    • 66
    • 88

    Chance Rain Showers

    • 63
    • 82

    Chance Rain Showers

Today 15 Sep Shelby

Mostly sunny. A slight chance of Showers and Thunderstorms late. Much warmer with Highs in the lower 90s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 15 Sep Shelby

Mostly clear with a slight chance of Showers and Thunderstorms through the late Overnight, then partly cloudy with a chance of Showers and Thunderstorms toward daybreak. Warmer with Lows in the lower 70s. Southeast Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marietta Temperature Statistics

September Temperature

Shelbyville Municipal Airport (10.6 miles)

  • Lowest 7 September, 2026

    59.6 °F

  • Average September

    77.9 °F

  • Highest 4 September, 2026

    96.7 °F

Climate (2021–2026)

Shelbyville Municipal Airport (10.6 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    56.9 °F

  • Average High 2021–2026

    67 °F
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