August in Roubaix averages a daily high of 24°C with nights around 14.2°C. Expect roughly 12.2 wet days totalling 72.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Roubaix is May–September.
Based on LILLE LESQUIN, FR (14.8km), 1995–2024. 30 years of August data.