June in Davenport averages a daily high of 27.8°C with nights around 17.7°C. Expect roughly 12.1 wet days totalling 130.3mm. 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 June data.