August in Chongjin is the warmest month of the year. In August, the weather in Chongjin is typically warm. Average daily high temperature in August is about 24 degrees above zero. On average, Chongjin has 19 rainy, 5 sunny, 4 partly cloudy, and 3 cloudy days in August. The rains are usually heavy. August as well as March, April, May, and June is considered the most uncomfortable time to visit Chongjin.