In Hainan, there is often a shower at night. When it rains and after it stops, people feel that the air is particularly hot and humid. What is the reason?

That's because Hainan has a subtropical climate. Summer is often controlled by ocean heating masses and tropical depression. In addition, Hainan is surrounded by the sea, and the air will certainly be humid. When the temperature is high, it will make people feel particularly stuffy. Before it rains, the air pressure will drop, and under the action of the sun and air pressure, a lot of water will evaporate into the air, and the air humidity will be higher, which is why it usually rains after it is sultry. As for why it is still hot after the rain, because of the geographical conditions in Hainan, most of the precipitation belongs to convective rain, unlike the cold air from the north who participates in the frontal rain in the inland and the north, so sometimes it will still be sultry after the rain (usually, there will be precipitation in a short time).