June in Cancun is the rainiest and the cloudiest month of the year. In June, the weather in Cancun is typically hot. Average daily high temperature in June is about 29 degrees above zero. On average, Cancun has 20 rainy, 8 sunny, and 2 partly cloudy days in June. The rains are usually heavy. June as well as August, September, and October is considered the most uncomfortable time to visit Cancun.