September in Mobile averages a daily high of 31.2°C with nights around 21.7°C. Expect roughly 8.5 wet days totalling 114.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Mobile is March–May.
Based on MOBILE DOWNTOWN AIRPORT, AL US (9.1km), 1995–2024. 27 years of September data.