July in Dandong is the rainiest and the cloudiest month of the year. In July, the weather in Dandong is typically warm. Average daily high temperature in July is about 26 degrees above zero. On average, Dandong has 15 rainy, 8 sunny, 6 partly cloudy, and 2 cloudy days in July. The rains are usually heavy. July as well as March, August, and November is considered the most uncomfortable time to visit Dandong.