Why is it so cold in winter in Shanghai?

First of all, Shanghai has a maritime climate with high air humidity. At the same temperature, you will feel that Shanghai is colder.

Secondly, the characteristic of Shanghai in winter is that it is warmer outside than inside, and no matter how to turn on the air conditioner, you have to use electric heating. Some rooms facing north are even below zero at night. In Shanghai, in addition to commercial places and high-grade office buildings with high room temperature, ordinary places should get used to wearing a lot of clothes indoors in winter. Cotton trousers and sweaters (autumn trousers, clothes) are the norm.