In September, Chattanooga typically sees daytime highs of 27.1°C and overnight lows around 15.5°C. Compared to the annual average high of 20.2°C, September runs +6.9°C.
September in Chattanooga averages a daytime high of 27.1°C and an overnight low of 15.5°C.
September runs +6.9°C compared to Chattanooga's annual average high of 20.2°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 27.1°C and cooler evenings around 15.5°C.