Why is it cool in the north and cold air in the south? Why is Guangdong still hot?

First of all, the arrival of cold air in Guangdong has been weakened a lot, and the blocking effect of Nanling makes it difficult for cold air to reach Guangdong.

Secondly, Guangdong is located at the intersection of tropics and subtropics at low latitudes, and the amount of solar radiation is large, resulting in higher temperatures.

Thirdly, Guangdong is located near the ocean, and most of the coastal areas are located in the tropics, so the evaporation of seawater is large, which will release a lot of heat (the specific heat capacity of water is very large).