In December, Chattanooga typically sees daytime highs of 9.9°C and overnight lows around -0.7°C. Compared to the annual average high of 20.2°C, December runs -10.3°C.
December in Chattanooga averages a daytime high of 9.9°C and an overnight low of -0.7°C.
December runs -10.3°C compared to Chattanooga's annual average high of 20.2°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 9.9°C and cooler evenings around -0.7°C.