October in Duluth averages a daily high of 12.1°C with nights around 4.3°C. Expect roughly 9.7 wet days totalling 79.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Duluth is June–September.
Based on SUPERIOR, WI US (6.8km), 1995–2024. 29 years of October data.