In October, Cancun has an average daily low of 73 to 76 degrees Fahrenheit, and an average daily high of 86 to 88 F. October is at the end of Cancun's wet season, with frequent short periods of heavy rainfall.
October is also at the end of Cancun's hurricane season, which begins in June. There is generally more rainfall around this time than at any other point in the year. Cancun usually experiences cooler temperatures than inland Mexico, due to its coastal location. The water temperature ranges from 73 to 80 F, which is comfortable for swimming. The dry season, beginning in November, is typically the coolest part of the year.