July in Davenport averages a daily high of 29.2°C with nights around 19.8°C. Expect roughly 8.4 wet days totalling 104.3mm. Generally workable, with some weather to plan around.
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 July data.