What is the climate like throughout the year in Konstanz, a city in southern Germany?

The climate there is similar to Beijing, but more humid than Beijing. If you go in September, bring autumn clothes, such as sweaters, coats, etc. You don’t need to wear a thick down jacket in winter, just a cotton coat. If you are not very afraid of the cold, you don’t need to wear underpants in winter. A pair of pants can get you through the winter. The summer there is not very hot. Even if it reaches 30 degrees during the day, it will be cooler as soon as the sun goes down. In Germany, many people use air conditioners.