In September, Marietta typically sees daytime highs of 28.2°C and overnight lows around 16.4°C. Compared to the annual average high of 22.0°C, September runs +6.2°C.
September in Marietta averages a daytime high of 28.2°C and an overnight low of 16.4°C.
September runs +6.2°C compared to Marietta's annual average high of 22.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 28.2°C and cooler evenings around 16.4°C.