The average daily air temperature on Cozumel is 80 degrees. In July and August, the highs range from the mid 80’s to the low 90’s. In December and January, the daytime temperatures average in the 70’s.
There are two rainy seasons on the island, one from October to January when rains often precede windy cold fronts called “nortes,” and from April through July, with June and July being the wettest months. Summer rains tend to be sudden, short events, while more sustained rains can occur in winter.
During the winter months (September-December) Cozumel experiences cold fronts that may create windy, cloudy and cooler weather. During the rainy season afternoon thunderstorms are common, usually lasting for an hour. Water temperatures range from 76 degrees-83 degrees throughout the year.
