September in Chattanooga averages a daily high of 25.1°C with nights around 16.7°C. Expect roughly 8.2 wet days totalling 129.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Chattanooga is April–June.
Based on LOOKOUT MTN POINT PARK, TN US (5.1km), 1995–2024. 27 years of September data.