In December, the weather in Southport is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Southport has 9 sunny, 9 partly cloudy, 5 rainy, 5 cloudy, and 3 snowy days in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Southport.