May in Coimbra averages a daily high of 22.1°C with nights around 11.2°C. Expect roughly 15 wet days totalling 132.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Coimbra is June–July.
Based on COIMBRA CERNACHE, PO (7.5km), 1995–2024. 20 years of May data.