May in Silverstone is the rainiest and the cloudiest month of the year. In May, the weather in Silverstone is typically warm. Average daily high temperature in May is about 15 degrees above zero. On average, Silverstone has 13 rainy, 11 partly cloudy, 5 cloudy, and 2 sunny days in May. The rains are usually moderate. May as well as January, February, March, and April is considered the most uncomfortable time to visit Silverstone.