I'm going to Switzerland for a self-help tour. What is the weather and temperature like in Switzerland?

The climate in Switzerland can be described simply and rudely in eight words, that is, it is not hot in summer and very cold in winter. The coat must be ready, the key is that it is really cold when it snows! At that time, I found an organization specializing in free travel outside Switzerland, and the itinerary was very detailed. There is also a clever tour guide who shows the way in Chinese and explains the scenic spots in Chinese. I couldn't order, so I took a photo and someone translated it right away. I'm looking for a green frog trip.