June in Isla Mujeres is the rainiest and the cloudiest month of the year. In June, the weather in Isla Mujeres is typically hot. Average daily high temperature in June is about 29 degrees above zero. On average, Isla Mujeres 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 Isla Mujeres.