In May, the weather in Iles de la Madeleine is typically warm. Average daily high temperature in May is about 10 degrees above zero. On average, Iles de la Madeleine has 15 rainy, 7 sunny, 6 cloudy, and 3 partly 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.