September in Baton Rouge averages a daily high of 31.7°C with nights around 20.6°C. Expect roughly 8.4 wet days totalling 117.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Baton Rouge is February–April.
Based on BATON ROUGE METRO AIRPORT, LA US (11.2km), 1995–2024. 30 years of September data.