January in Sassari is the coldest month of the year. In January, the weather in Sassari is typically warm. Average daily high temperature in January is about 12 degrees above zero. On average, Sassari has 11 rainy, 9 sunny, 8 partly cloudy, and 3 cloudy days in January. The rains are usually moderate. January as well as February, March, November, and December is considered the most uncomfortable time to visit Sassari.