May in Quimper averages a daily high of 16.9°C with nights around 8.9°C. Expect roughly 13.7 wet days totalling 75.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Quimper is June–September.
Based on BREST GUIPAVAS, FR (55km), 1995–2024. 30 years of May data.