October in Iowa City averages a daily high of 17.7°C with nights around 5.2°C. Expect roughly 9 wet days totalling 75.8mm. Comfortable conditions for being outdoors all day.
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. 30 years of October data.