In May, the weather in Iles de la Madeleine is typically warm. Average daily high temperature in May is about 12 degrees above zero. On average, Iles de la Madeleine has 13 rainy, 7 sunny, 6 partly cloudy, and 5 cloudy days in May. The rains are usually heavy. May as well as January, February, April, and June is considered the most uncomfortable time to visit Iles de la Madeleine.