Temperatures in Cancun and the Mexican Caribbean are typically mild all year long In the month of October, the temperature doesn't change much during the course of a typical day.
The afternoon high temperature will typically reach degrees falling to degrees late at night.
As shown above, during the first part of the month the low temperature averages degrees and the high averages degrees. During the middle of the month the daily low is typically around degrees and the high is about degrees on average. Over the last part of October the lowest temperature reading averages degrees and the high temperature averages degrees. To learn more about temperature fluctuations during October in Cancun and the Mexican Caribbean, review the above table.