July in Namyangju is the rainiest and the cloudiest month of the year. In July, the weather in Namyangju is typically warm. Average daily high temperature in July is about 26 degrees above zero. On average, Namyangju has 24 rainy, 5 sunny, and 2 cloudy days in July. The rains are usually heavy. July as well as August and November is considered the most uncomfortable time to visit Namyangju.