August in Appleton averages a daily high of 26.4°C with nights around 15.2°C. Expect roughly 10.7 wet days totalling 99.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Appleton is May–September.
Based on APPLETON, WI US (2.4km), 1995–2024. 30 years of August data.