May in Sants-Montjuïc averages a daily high of 21.9°C with nights around 14.3°C. Expect roughly 6.1 wet days totalling 40.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Sants-Montjuïc is May–July.
Based on BARCELONA AEROPUERTO, SP (11.4km), 1995–2024. 30 years of May data.