January in Sandanski is the snowiest and the coldest month of the year. In January, the weather in Sandanski is typically cold. Average daily high temperature in January is about 1 degree above zero. On average, Sandanski has 11 sunny, 8 partly cloudy, 6 cloudy, 3 rainy, and 3 snowy days in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Sandanski.