October in Oshkosh averages a daily high of 15.3°C with nights around 5.3°C. Expect roughly 10.7 wet days totalling 73.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Oshkosh is May–September.
Based on OSHKOSH, WI US (1.3km), 1995–2024. 30 years of October data.