October in Dubuque averages a daily high of 16.6°C with nights around 6.1°C. Expect roughly 9.2 wet days totalling 81.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Dubuque is August–September.
Based on DUBUQUE LOCK AND DAM 11, IA US (4.6km), 1995–2024. 30 years of October data.