July in Skagway is the warmest month of the year. In July, the weather in Skagway is typically warm. Average daily high temperature in July is about 11 degrees above zero. On average, Skagway has 22 rainy, 8 cloudy, and 1 sunny day in July. The rains are usually moderate. July as well as April, May, June, and August is considered the most uncomfortable time to visit Skagway.