December in Gangneung is the windiest month of the year. In December, the weather in Gangneung is typically cold. Average daily high temperature in December is about 1 degree above zero. On average, Gangneung has 21 sunny, 8 partly cloudy, 1 rainy, and 1 snowy day in December. December as well as February, March, July, and August is considered the most uncomfortable time to visit Gangneung.