In April, the weather in Sault Ste. Marie is typically cold. Average daily high temperature in April is about 6 degrees above zero. On average, Sault Ste. Marie has 11 rainy, 8 cloudy, 6 partly cloudy, and 5 sunny days in April. The rains are usually light. April as well as October and November is considered the most uncomfortable time to visit Sault Ste. Marie.