What's the weather like in Nanjing in four seasons?

The climate in Nanjing is not very good. Spring feels a little short. I feel that April is spring and May is summer. Although it can't be fully referenced, there are always other reasons why Nanjing was able to rank among the four major stove cities in the past. It is especially hot and humid in summer, especially in rainy season. Because Nanjing is not a heating city in the north, the sultry summer will become cold and humid in winter. For the elderly and cardiovascular patients, Xia Dong is severe in both seasons. Autumn is ok, more comfortable. Air pollution and smog make it hard to stay in Nanjing!