October in Incheon is the sunniest month of the year. In October, the weather in Incheon is typically warm. Average daily high temperature in October is about 18 degrees above zero. On average, Incheon has 23 sunny, 7 partly cloudy, and 1 rainy day in October. The rains are usually moderate. October as well as September is considered the most comfortable time to visit Incheon.