December in Sevastopol is the windiest month of the year. In December, the weather in Sevastopol is typically cold. Average daily high temperature in December is about 7 degrees above zero. On average, Sevastopol has 10 cloudy, 9 rainy, 7 sunny, and 5 partly cloudy days in December. The rains are usually moderate. December as well as January, February, and March is considered the most uncomfortable time to visit Sevastopol.