May in Granollers 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 Granollers is May–July.
Based on BARCELONA AEROPUERTO, SP (39.5km), 1995–2024. 30 years of May data.