September in Franklin averages a daily high of 28.5°C with nights around 15.3°C. Expect roughly 8.4 wet days totalling 101.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Franklin is April–May.
Based on FRANKLIN SEWAGE PLANT, TN US (1.8km), 1995–2024. 29 years of September data.