June in Cowes is the cloudiest month of the year. In June, the weather in Cowes is typically warm. Average daily high temperature in June is about 13 degrees above zero. On average, Cowes has 13 rainy, 10 cloudy, 4 sunny, and 3 partly cloudy days in June. The rains are usually heavy. June as well as May, July, August, and September is considered the most uncomfortable time to visit Cowes.