December in Ankeny averages a daily high of 1.9°C with nights around -8.6°C. Expect roughly 6.7 wet days totalling 31.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Ankeny is September–October.
Based on ANKENY, IA US (3.7km), 1995–2024. 23 years of December data.