December in Bournemouth is the windiest month of the year. In December, the weather in Bournemouth is typically cold. Average daily high temperature in December is about 8 degrees above zero. On average, Bournemouth has 17 rainy, 6 cloudy, 4 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 Bournemouth.