August in Detroit averages a daily high of 27.9°C with nights around 18.2°C. Expect roughly 9.5 wet days totalling 84.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Detroit is August–September.
Based on DETROIT CITY AIRPORT, MI US (9km), 1995–2024. 28 years of August data.