September in Kingsport averages a daily high of 27.5°C with nights around 14.8°C. Expect roughly 8.1 wet days totalling 82mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Kingsport is April–May.
Based on KINGSPORT, TN US (4.5km), 1995–2024. 29 years of September data.