December in Yarmouth is the rainiest month of the year. In December, the weather in Yarmouth is typically cold. Average daily high temperature in December is about 4 degrees above zero. On average, Yarmouth has 22 rainy, 4 cloudy, 3 sunny, 1 snowy, and 1 partly cloudy day in December. The rains are usually heavy. December as well as January, February, March, and November is considered the most uncomfortable time to visit Yarmouth.