In March, the weather in Jamestown is typically cold. Average daily high temperature in March is about 2 degrees above zero. On average, Jamestown has 20 cloudy, 4 sunny, 3 rainy, 3 partly cloudy, and 1 snowy day in March. The rains are usually heavy. March as well as January, February, April, and November is considered the most uncomfortable time to visit Jamestown.