August in Sants-Montjuïc averages a daily high of 29.1°C with nights around 21.6°C. Expect roughly 5.4 wet days totalling 50.3mm. 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 August data.