January in Jamestown is the snowiest, the cloudiest, and the most freezing month of the year. In January, the weather in Jamestown is typically freezing. Average daily high temperature in January is about 7 degrees below zero. On average, Jamestown has 10 partly cloudy, 9 cloudy, 7 sunny, and 5 snowy days in January. The snowfalls are usually light. January as well as March, April, and November is considered the most uncomfortable time to visit Jamestown.