Who knows what the weather is like in August in Ganzi Tibetan Autonomous Prefecture and what clothes to wear when traveling?

I have been to Ganzi in early May, and it is only a few degrees in the evening. They are all winter clothes. It's summer in the plateau, the ultraviolet rays are very strong, and the temperature difference between day and night is still very large. It is recommended to take a coat, a sunscreen suit, a long short-sleeved T-shirt, a hat and a pair of sunglasses to do a good job of sun protection. And portable oxygen, just in case. Rhodiola sachalinensis was tested by myself and my friends, and the oxygen-carrying tablets sold by Taobao can take care of it for a period of time.