January in Lisbon is the coldest month of the year. In January, the weather in Lisbon is typically warm. Average daily high temperature in January is about 14 degrees above zero. On average, Lisbon has 11 sunny, 10 rainy, 9 partly cloudy, and 1 cloudy day in January. The rains are usually moderate. January as well as February, March, November, and December is considered the most uncomfortable time to visit Lisbon.