April in Mount Pleasant is the windiest month of the year. In April, the weather in Mount Pleasant is typically warm. Average daily high temperature in April is about 13 degrees above zero. On average, Mount Pleasant has 10 rainy, 9 sunny, 6 partly cloudy, and 5 cloudy days in April. The rains are usually heavy. April as well as January, February, March, and October is considered the most uncomfortable time to visit Mount Pleasant.