September in Rochester averages a daily high of 22.6°C with nights around 10.6°C. Expect roughly 8.7 wet days totalling 85.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Rochester is June–September.
Based on ROCHESTER INTERNATIONAL AIRPORT, MN US (13.2km), 1995–2024. 30 years of September data.