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