October in Waukesha averages a daily high of 16.1°C with nights around 4.4°C. Expect roughly 9.9 wet days totalling 70.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Waukesha is June–September.
Based on WAUKESHA WWTP, WI US (2.2km), 1995–2024. 20 years of October data.