July in Hornsund is the rainiest and the cloudiest month of the year. In July, the weather in Hornsund is typically cold. Average daily high temperature in July is about 3 degrees above zero. On average, Hornsund has 14 cloudy, 9 rainy, 6 partly cloudy, and 2 sunny days in July. The rains are usually light. July as well as January, February, March, and April is considered the most uncomfortable time to visit Hornsund.