Cancún is the perfect summer holiday destination all times of the year. On average it is around 25 degrees to 28 degrees. Between May and October it is tropical raining season and from November through April is the driest. Moreover, the sea temperature of the ocean is between 25 and 30 degrees all year.  

Cancún is a tropical climate; this means that it is possible to get hurricanes and extreme weather conditions in the rainy season. 

But overall: it is always beautiful, nice and warm weather in Cancún!