May in Cedar Rapids averages a daily high of 23.1°C with nights around 10.3°C. Expect roughly 13 wet days totalling 121.3mm. Generally workable, with some weather to plan around.
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 May data.