October in West Allis averages a daily high of 17°C with nights around 5.5°C. Expect roughly 11.8 wet days totalling 59mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit West Allis is August–September.
Based on WEST ALLIS, WI US (2.5km), 1995–2024. 13 years of October data.