Why is Xi 'an so hot?

Mainly due to the geographical environment.

Xi 'an is located in the valley, sandwiched between Nanshan and Beishan, and has the characteristics of heat accumulation. In summer, heat gathers together and spreads slowly, which is prone to continuous high temperature. It is also related to the deepening of urbanization. Because there are more and more people in cities, the heat sources are increasing, and the most obvious ones are air conditioners and cars.