March in Oshkosh averages a daily high of 5.4°C with nights around -4.5°C. Expect roughly 8.8 wet days totalling 53.7mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Oshkosh is May–September.
Based on OSHKOSH, WI US (1.3km), 1995–2024. 30 years of March data.