September in Terre Haute averages a daily high of 27.8°C with nights around 12.7°C. Expect roughly 7.1 wet days totalling 76.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Terre Haute is April–May.
Based on TERRE HAUTE INDIANA STATE, IN US (0.7km), 1995–2024. 18 years of September data.