September in Roswell averages a daily high of 28.6°C with nights around 17.6°C. Expect roughly 8.1 wet days totalling 106.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Roswell is September–November.
Based on ATLANTA DEKALB PEACHTREE AIRPORT, GA US (17.1km), 1995–2024. 27 years of September data.