March in Isla Mujeres is the windiest and the sunniest month of the year. In March, the weather in Isla Mujeres is typically warm. Average daily high temperature in March is about 26 degrees above zero. On average, Isla Mujeres has 27 sunny and 4 rainy days in March. The rains are usually light. March as well as February and April is considered the most comfortable time to visit Isla Mujeres.