August in Davenport averages a daily high of 28.3°C with nights around 18.9°C. Expect roughly 9.4 wet days totalling 103.3mm. Comfortable conditions for being outdoors all day.
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 August data.