January in Split is the coldest month of the year. In January, the weather in Split is typically cold. Average daily high temperature in January is about 8 degrees above zero. On average, Split has 12 sunny, 10 rainy, 5 partly cloudy, and 4 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 Split.