December in Westerland is the windiest month of the year. In December, the weather in Westerland is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Westerland has 22 rainy, 4 cloudy, 3 sunny, and 2 partly cloudy days in December. The rains are usually heavy. December as well as January, February, August, and September is considered the most uncomfortable time to visit Westerland.