April in Sants-Montjuïc averages a daily high of 18.7°C with nights around 10.8°C. Expect roughly 6.7 wet days totalling 47.8mm. 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. 29 years of April data.