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