September in Iles de la Madeleine is the sunniest month of the year. In September, the weather in Iles de la Madeleine is typically warm. Average daily high temperature in September is about 15 degrees above zero. On average, Iles de la Madeleine has 12 rainy, 9 sunny, 6 partly cloudy, and 3 cloudy days in September. The rains are usually heavy. September as well as January, February, April, and May is considered the most uncomfortable time to visit Iles de la Madeleine.