July in Oshkosh averages a daily high of 27.9°C with nights around 17.3°C. Expect roughly 9.9 wet days totalling 93.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Oshkosh is May–September.
Based on OSHKOSH, WI US (1.3km), 1995–2024. 30 years of July data.