May in Vallecas averages a daily high of 23.5°C with nights around 12.1°C. Expect roughly 8.1 wet days totalling 44.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Vallecas is May–June.
Based on MADRID RETIRO, SP (6.1km), 1995–2024. 30 years of May data.