January in Corby is the coldest month of the year. In January, the weather in Corby is typically cold. Average daily high temperature in January is about 6 degrees above zero. On average, Corby has 13 rainy, 10 cloudy, 5 sunny, and 3 partly cloudy days in January. The rains are usually moderate. January as well as February, March, April, and June is considered the most uncomfortable time to visit Corby.