If you’re planning a trip to the Mexican Caribbean, knowing the Cancún weather in May is key to organizing the perfect getaway. This month marks the transition from the dry season to the rainy season, but it’s still one of the best times to enjoy beaches, tours, and outdoor adventures. The weather in Cancún in May is hot and humid, with daytime temperatures ranging from 31°C to 33°C (88°F–91°F), while nights stay warm around 24°C (75°F). Humidity increases during this time, c