May in Cannes averages a daily high of 21.1°C with nights around 14.7°C. Expect roughly 6.5 wet days totalling 42mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Cannes is May–October.
Based on NICE, FR (19.2km), 1995–2024. 30 years of May data.