June in Castle Donington is the rainiest month of the year. In June, the weather in Castle Donington is typically warm. Average daily high temperature in June is about 17 degrees above zero. On average, Castle Donington has 19 rainy, 5 sunny, 5 cloudy, and 1 partly cloudy day in June. The rains are usually moderate. June as well as January, February, March, and July is considered the most uncomfortable time to visit Castle Donington.