What is the lowest temperature in winter in Korea? Why do they wear everything?

February to March of the following year is winter in Korea, and the temperature is generally below zero. "Three cold and four warm" is the most common phenomenon. That is, after three days of cold, there must be four days of warmth. When it is cold, it is windy and dry.

Don't Japan wear everything, too? It's dry and cold there, unlike the south of China, which is wet and cold. If the weather is dry and cold, it is not easy to get sick if you wear less joints.