In April, the weather in Sept-Iles is typically cold. Average daily high temperature in April is about 2 degrees above zero. On average, Sept-Iles has 10 rainy, 8 cloudy, 5 sunny, 4 partly cloudy, and 3 snowy days in April. The rains are usually heavy. April as well as January, February, May, and October is considered the most uncomfortable time to visit Sept-Iles.