August in Chattanooga averages a daily high of 28.3°C with nights around 19.8°C. Expect roughly 10.2 wet days totalling 100.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Chattanooga is April–June.
Based on LOOKOUT MTN POINT PARK, TN US (5.1km), 1995–2024. 26 years of August data.