January in Dubrovnik is the coldest month of the year. In January, the weather in Dubrovnik is typically cold. Average daily high temperature in January is about 9 degrees above zero. On average, Dubrovnik has 12 rainy, 11 sunny, 5 cloudy, and 3 partly cloudy days in January. The rains are usually heavy. January as well as February, March, April, and November is considered the most uncomfortable time to visit Dubrovnik.