What does it mean to want to spend the summer in the mountains in hot summer?

In hot summer weather, people will think of going to high-altitude mountain areas for summer vacation in hot weather, because the temperature in high-altitude areas is relatively low and the air humidity is relatively high, which can alleviate the discomfort caused by hot summer. This is because with the increase of altitude, the atmospheric pressure will decrease and the humidity of the air will also decrease, which will lead to the decrease of the somatosensory temperature. At the same time, the low ozone content in the atmosphere at high altitude makes high altitude areas more vulnerable to solar ultraviolet radiation, thus increasing the ultraviolet intensity at high altitude areas. Therefore, in hot summer weather, people will want to go to high-altitude areas to escape the heat, so as to relieve the discomfort caused by high temperature. In short, the phrase "I want to spend the summer in the mountains on hot days" means that in hot weather, people will want to go to high-altitude mountainous areas for the summer to relieve the discomfort caused by hot summer.