September in Bloomington averages a daily high of 26.1°C with nights around 13.6°C. Expect roughly 7.3 wet days totalling 91.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Bloomington is September–October.
Based on BLOOMINGTON INDIANA UNIVERSITY, IN US (1.1km), 1995–2024. 28 years of September data.