Benchmarked strictly across TripTiming's 5 empirical pillars: Crowds, Weather, Vibes, Prices, and Safety.
Madrid emerges as the optimal May destination with an overall TripTiming Index of 65/100 vs 62/100 for Barcelona (+3 point advantage). Madrid pulses with significantly higher cultural energy, active events, and evening terrace life (85/100 vs 65/100). Sightseeing is further aided by comfortable outdoor weather (20°C feels-like). While Barcelona retains an edge in Price & Value (51/100 vs 28/100), Madrid's commanding performance in City Vitality secures the overall May recommendation.