Naturally you can visit Isla Mujeres any time of the year, and the sun will be shining and it will be somewhere between warm and hot. The reason some people avoid the summer is because of the hurricane season, which in theory runs from June to November. This is probably a mistake, as we have not seen a hurricane in June or November. There was one hurricane that came quite early one year, but that was  very unusual; otherwise, if there is a hurricane, it will generally be in t