December in Davenport averages a daily high of 2.7°C with nights around -5°C. Expect roughly 10.5 wet days totalling 52.1mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Davenport is August–September.
Based on ROCK ISLAND LOCK AND DAM 15, IL US (1.2km), 1995–2024. 30 years of December data.