January in Zadar is the rainiest, the cloudiest, and the coldest month of the year. In January, the weather in Zadar is typically cold. Average daily high temperature in January is about 9 degrees above zero. On average, Zadar has 11 sunny, 9 rainy, 9 partly cloudy, and 2 cloudy days in January. The rains are usually heavy. January as well as February and December is considered the most uncomfortable time to visit Zadar.