What's the weather like in July in western Sichuan?

Go to Daocheng Aden in July, where the weather will not be very hot (you can see the cold-proof clothes you need to bring from the attached photos), but it may be very hot in some places on the way and you need to wear summer clothes.

On July 30th, 20 17, walk five kilometers from Luo Rong Niuchang (4 180m above sea level) to Milk Sea (4600m above sea level), then walk 500 meters to Wuse Sea (4700m above sea level), and take photos of tourists' clothes:

I am in the colorful sea of Yangmaiyong Snow Mountain;

Alpine grassland in western Sichuan (in Litang):