July in Namyangju is the rainiest and the cloudiest month of the year. In July, the weather in Namyangju is typically hot. Average daily high temperature in July is about 28 degrees above zero. On average, Namyangju has 18 rainy, 5 cloudy, 5 partly cloudy, and 3 sunny days in July. The rains are usually heavy. July as well as January, February, August, and December is considered the most uncomfortable time to visit Namyangju.