July in Incheon is the rainiest and the cloudiest month of the year. In July, the weather in Incheon is typically warm. Average daily high temperature in July is about 26 degrees above zero. On average, Incheon has 19 rainy, 7 sunny, 3 partly cloudy, and 2 cloudy days in July. The rains are usually heavy. July as well as January, February, March, and August is considered the most uncomfortable time to visit Incheon.