August in Jinhae-gu is the hottest month of the year. In August, the weather in Jinhae-gu is typically hot. Average daily high temperature in August is about 30 degrees above zero. On average, Jinhae-gu has 16 rainy, 7 sunny, 5 partly cloudy, and 3 cloudy days in August. The rains are usually heavy. August as well as January and July is considered the most uncomfortable time to visit Jinhae-gu.