August in Milwaukee averages a daily high of 26.5°C with nights around 17.8°C. Expect roughly 9.5 wet days totalling 92.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Milwaukee is June–September.
Based on MILWAUKEE MITCHELL AIRPORT, WI US (9.3km), 1995–2024. 30 years of August data.