June in Seward is the cloudiest month of the year. In June, the weather in Seward is typically cold. Average daily high temperature in June is about 9 degrees above zero. On average, Seward has 16 rainy, 7 partly cloudy, 4 sunny, and 3 cloudy days in June. The rains are usually heavy. June as well as April, May, July, and August is considered the most uncomfortable time to visit Seward.