September in Huntsville averages a daily high of 29.7°C with nights around 17.2°C. Expect roughly 6.9 wet days totalling 87.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Huntsville is April–May.
Based on HUNTSVILLE INTNL AIRPORT, AL US (20.7km), 1995–2024. 30 years of September data.