September in Gainesville averages a daily high of 31.3°C with nights around 20.9°C. Expect roughly 10.9 wet days totalling 135.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Gainesville is October–April.
Based on GAINESVILLE REGIONAL AIRPORT, FL US (6.5km), 1995–2024. 30 years of September data.