I will stay in chengde mountain resort in the second half of August. How's the weather? Is the ultraviolet ray strong? Do you want to prepare thick clothes? What should I pay attention to?

You are very lucky. It is the best season in Chengde when you come.

It won't be very hot or cold, about 27 degrees. Just wear summer clothes. If it rains, wear long sleeves. You don't need thick clothes. Chengde and Beijing are not far apart in ultraviolet light. Chengde is a small town, just like other places. You'll know when you come.

Good luck ~ ~