Where is the temperature below minus 40℃ in June and July?

In June, the weather there is very good and comfortable, and it is still a little cold where there is no sun. Just take a coat (if you want to go to some places, such as Yanghu and Namco, it will be cold at night, or take thick clothes), and bring rain gear, it will rain when the clouds come. Pay attention to sun protection over there, the ultraviolet rays are very strong. After all, it's a plateau. Don't do strenuous exercise or eat anything too greasy the other day. Drinking butter tea as much as possible can help you adapt to the plateau climate quickly.