January in Bologna is the coldest month of the year. In January, the weather in Bologna is typically cold. Average daily high temperature in January is about 6 degrees above zero. On average, Bologna has 15 partly cloudy, 10 sunny, 4 rainy, and 2 cloudy days in January. The rains are usually light. January as well as February, March, November, and December is considered the most uncomfortable time to visit Bologna.