January in Sozopol is the rainiest and the coldest month of the year. In January, the weather in Sozopol is typically cold. Average daily high temperature in January is about 5 degrees above zero. On average, Sozopol has 11 rainy, 8 sunny, 8 partly cloudy, and 4 cloudy days in January. The rains are usually heavy. January as well as February, March, and December is considered the most uncomfortable time to visit Sozopol.