June in Waukesha averages a daily high of 25.3°C with nights around 13.6°C. Expect roughly 11.2 wet days totalling 123.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Waukesha is June–September.
Based on WAUKESHA WWTP, WI US (2.2km), 1995–2024. 19 years of June data.