July in Ames averages a daily high of 29.2°C with nights around 17.4°C. Expect roughly 10.3 wet days totalling 101.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Ames is September.
Based on AMES MUNICIPAL AIRPORT, IA US (4.9km), 1995–2024. 28 years of July data.