In December, the weather in Weston-super-Mare is typically cold. Average daily high temperature in December is about 8 degrees above zero. On average, Weston-super-Mare has 15 rainy, 7 cloudy, 5 sunny, and 4 partly cloudy days in December. The rains are usually moderate. December as well as January, February, and November is considered the most uncomfortable time to visit Weston-super-Mare.