In March, the weather in Jamestown is typically cold. Average daily high temperature in March is about 4 degrees above zero. On average, Jamestown has 17 rainy, 5 snowy, 4 cloudy, 3 sunny, and 2 partly cloudy days in March. The rains are usually heavy. March as well as April, May, October, and November is considered the most uncomfortable time to visit Jamestown.