January in Venice is the coldest month of the year. In January, the weather in Venice is typically cold. Average daily high temperature in January is about 7 degrees above zero. On average, Venice has 11 sunny, 9 rainy, 7 partly cloudy, and 4 cloudy days in January. The rains are usually heavy. January as well as February, March, November, and December is considered the most uncomfortable time to visit Venice.