August in Ames averages a daily high of 27.9°C with nights around 15.8°C. Expect roughly 11.8 wet days totalling 119.3mm. 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 August data.