Why is Xinjiang so hot in summer?

Because the specific heat capacity of the ground near Xinjiang desert is very small.

The morning temperature in Xinjiang is lower than the ground temperature, and the ground releases heat to the air, which lowers the temperature. Because the specific heat c is very small, the δ t is very large and the ground temperature is very low.

At noon, the solar radiation is very strong, and the ground absorbs heat and heats up. Xinjiang has high altitude, less precipitation and less clouds. At noon, the intensity of solar radiation weakened by clouds is very small and there is high altitude, so the temperature at noon is very high.

At night, because the clouds are thin, the atmosphere has little influence on the ground and the heat is dissipated quickly, so the temperature in the morning is low, which leads to a large temperature difference between day and night.

Extended data:

1, Xinjiang is far from the ocean, living in the inland, surrounded by mountains, and the ocean airflow is not easy to reach, forming an obvious temperate continental climate. The temperature difference is large, the sunshine time is sufficient (the annual sunshine time is 2500 ~ 3500 hours), the precipitation is small and the climate is dry.

2. In the hottest month (July), the average temperature in Turpan, known as Huozhou, was above 33℃, and the absolute maximum temperature reached 49.6℃, ranking first in the country. Due to the great temperature difference between spring, summer, autumn and winter in most parts of Xinjiang, there has always been a saying that "wear leather clothes at noon and eat watermelon around the stove".

Baidu Encyclopedia-Xinjiang