Why is it so hot in Hangzhou in summer?

Hangzhou is located in the plain area of the middle and lower reaches of the Yangtze River. This area belongs to subtropical monsoon climate. The temperature changes obviously in summer and winter. Hangzhou is so hot in summer because of the influence of monsoon climate. The plain area in the middle and lower reaches of the Yangtze River is controlled by subtropical high, and the warm and humid airflow formed in the South Pacific is strong, which lingers in this area almost all summer. In addition, Hangzhou is a big city with dense population and large carbon dioxide emissions. Exhaust gas and heat energy emissions from urban industrial areas have increased the temperature in Hangzhou. This is a term mentioned in geography: urban fever should be ignored. The average temperature in the city center is about 2 degrees higher than that in the surrounding satellite cities.

That's why it is hot in summer.

Ha ha.