January in Jinhae-gu is the sunniest and the coldest month of the year. In January, the weather in Jinhae-gu is typically cold. Average daily high temperature in January is about 5 degrees above zero. On average, Jinhae-gu has 26 sunny, 3 partly cloudy, 1 rainy, and 1 cloudy day in January. The rains are usually light. January as well as February, March, July, and August is considered the most uncomfortable time to visit Jinhae-gu.