March in Isla Mujeres is the windiest month of the year. In March, the weather in Isla Mujeres is typically warm. Average daily high temperature in March is about 25 degrees above zero. On average, Isla Mujeres has 18 sunny, 7 rainy, and 6 partly cloudy days in March. The rains are usually light. March as well as April is considered the most comfortable time to visit Isla Mujeres.