September in Ankeny averages a daily high of 25.5°C with nights around 11°C. Expect roughly 7.8 wet days totalling 83.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Ankeny is September–October.
Based on ANKENY, IA US (3.7km), 1995–2024. 24 years of September data.