By May, the Atlas Mountains have shed their snow, and Marrakech is firing up its summer engine. The heat here is assertive. By 11 AM, the medina’s red walls radiate stored warmth from the night before. This is the perfect time to experience the city’s famous hot breath without the 115°F (46°C) insanity of August.
Seville is the hottest city in continental Europe, and May is when the furnace door starts to open. By the last week of May, los termómetros (the thermometers) often flirt with 100°F. But unlike the sticky heat of Rome or Athens, Seville’s heat is an ancient, dry heat that locals have mastered for centuries.
Let’s be clear: May in Bangkok is not “pleasant.” It is aggressively hot. This is the true test of whether you mean “summer vacation hot” as a aesthetic or a physical challenge. May is the tail end of the hot season, just before the monsoon rains break. The heat is thick, wet, and ever-present.
Las Vegas in May is a controlled burn. The city’s pool season officially kicks off in late April, but May is when the temperature becomes the event . Unlike July, where walking the Strip feels like walking inside a hair dryer, May’s heat is energizing rather than dangerous.