May in Le Mans averages a daily high of 18.7°C with nights around 8.4°C. Expect roughly 12.2 wet days totalling 65.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Le Mans is June–September.
Based on ALENCON VALFRAMBERT, FR (49.8km), 1995–2024. 30 years of May data.