when does it get cold in south korea
Climate of Seoul The winter in Seoul is controlled by the large Siberian high pressure system (the Asiatic high), which results in predominantly cold, dry north-westerly winds. The influence of the Siberian high leads to significantly colder winter temperatures than would be expected at this latitude. About every 4 to 6 days a low-pressure trough will move through South Korea, bringing with it cloudiness and light precipitation. The amount of precipitation locally depends mostly on the elevation of the station and the length of time that the air has been over the Yellow Sea. Maximum snowfall occurs over the northwest coast, which is the most exposed to the northwesterly flow, and in the mountain areas. Normally less than 10 percent of the annual precipitation falls during the winter. Frequently the weather is cloudless, clear, and dry, except for the southwestern region of the peninsula. The mean January temperature in Seoul is -2.4 °C (27 °F). January, is the coldest month in Seoul, often with the lowest temperatures, almost always dropping below -10 °C (14 °F), and sometimes below -15 °C (5 °F).