In March, the weather in Sioux Falls is typically cold. Average daily high temperature in March is about 6 degrees above zero. On average, Sioux Falls has 11 cloudy, 8 partly cloudy, 6 sunny, 5 rainy, and 1 snowy day in March. The rains are usually light. March as well as April, May, and November is considered the most uncomfortable time to visit Sioux Falls.