Which place is hot in Haikou and Ding 'an in summer?

Haikou is very hot. Haikou and Ding 'an are located in tropical areas, which are influenced by tropical monsoon climate. Summer tropical monsoon climate usually brings high temperature and humidity, which leads to higher summer temperatures in Haikou and Ding 'an. Because Haikou is close to the ocean, the humidity may be relatively high, and it feels sultry.