January in Silverstone is the coldest month of the year. In January, the weather in Silverstone is typically cold. Average daily high temperature in January is about 6 degrees above zero. On average, Silverstone has 11 rainy, 9 cloudy, 7 partly cloudy, and 4 sunny days in January. The rains are usually moderate. January as well as February, March, April, and May is considered the most uncomfortable time to visit Silverstone.