In March, the weather in Williston is typically cold. Average daily high temperature in March is about 3 degrees above zero. On average, Williston has 21 cloudy, 4 sunny, 3 partly cloudy, 2 rainy, and 1 snowy day in March. The rains are usually light. March as well as January, April, November, and December is considered the most uncomfortable time to visit Williston.