In December, Marietta typically sees daytime highs of 12.4°C and overnight lows around 0.7°C. Compared to the annual average high of 22.0°C, December runs -9.7°C.
December in Marietta averages a daytime high of 12.4°C and an overnight low of 0.7°C.
December runs -9.7°C compared to Marietta's annual average high of 22.0°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 12.4°C and cooler evenings around 0.7°C.