What's the weather like in Chengde in May?

This season, I like to wear a pair of jeans with a half sleeve and a long-sleeved coat outside. The temperature difference in Chengde is very large, and there is a big difference between noon and morning and evening. I think it's more comfortable to wear this way. Take it off in hot weather and wear it in cold weather. Personally, I like the temperature at this time best, if only it were like this all year round, hehe ~!