December in Franklin averages a daily high of 10.6°C with nights around -0.3°C. Expect roughly 12 wet days totalling 126.8mm. Demanding conditions — pack for it and plan indoor options.
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 December data.