June in Oshkosh averages a daily high of 25.4°C with nights around 15.1°C. Expect roughly 11.7 wet days totalling 124.9mm. 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 June data.