September in Cedar Rapids averages a daily high of 25.6°C with nights around 12.4°C. Expect roughly 7.9 wet days totalling 90.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Cedar Rapids is September.
Based on CEDAR RAPIDS NUMBER 1, IA US (6.5km), 1995–2024. 30 years of September data.