July in West Allis averages a daily high of 28.8°C with nights around 17.1°C. Expect roughly 10 wet days totalling 110.7mm. 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 July data.