June in Iowa City averages a daily high of 28°C with nights around 16.3°C. Expect roughly 11.6 wet days totalling 119.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Iowa City is August–October.
Based on IOWA CITY MUNICIPAL AIRPORT, IA US (2.7km), 1995–2024. 28 years of June data.