"The average daily air temperature on Cozumel is 80 degrees (27°C). In July/August, the highs range from the upper 80s to the low 90s. (32°C) In December and January, the daytime temperatures average in the mid-70s.(24° C.)Winter Months: Cold fronts may create windy, cloudy and cooler weather. Afternoon thunderstorms are common, usually lasting for an hour.
Water temperatures range from 77°-82°F (25°-28°C) throughout the year."
5/24/2008 - Carnival Inspiration
5/11/2007 - RC Sovereign of the Seas
5/14/2006 - Carnival Elation