May in Appleton averages a daily high of 19.5°C with nights around 7.6°C. Expect roughly 12.2 wet days totalling 95.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Appleton is May–September.
Based on APPLETON, WI US (2.4km), 1995–2024. 30 years of May data.