August in Donghae is the rainiest month of the year. In August, the weather in Donghae is typically warm. Average daily high temperature in August is about 25 degrees above zero. On average, Donghae has 15 rainy, 9 sunny, 6 partly cloudy, and 1 cloudy day in August. The rains are usually heavy. August as well as January, February, March, and November is considered the most uncomfortable time to visit Donghae.