April in Appleton averages a daily high of 12.4°C with nights around 1°C. Expect roughly 11.8 wet days totalling 80.5mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Appleton is May–September.
Based on APPLETON, WI US (2.4km), 1995–2024. 30 years of April data.