January in Peterborough is the coldest month of the year. In January, the weather in Peterborough is typically cold. Average daily high temperature in January is about 6 degrees above zero. On average, Peterborough has 12 cloudy, 11 rainy, 5 sunny, and 3 partly cloudy days in January. The rains are usually moderate. January as well as February, June, July, and November is considered the most uncomfortable time to visit Peterborough.