January in Split is the cloudiest and the coldest month of the year. In January, the weather in Split is typically cold. Average daily high temperature in January is about 9 degrees above zero. On average, Split has 11 sunny, 10 partly cloudy, 9 rainy, and 1 cloudy day in January. The rains are usually heavy. January as well as February, March, November, and December is considered the most uncomfortable time to visit Split.