Which month is the wettest in Haikou?

Hainan has a tropical monsoon climate, and Haikou is in the northernmost part of Hainan. June 5438-March in Hainan is winter, and cold air from the north will enter in winter, so there will be weather below 10 degrees in Haikou. However, after the cold air left, the warm and humid air quickly counterattacked, resulting in an increase in temperature and air humidity. Some cold objects condense to produce water droplets when they meet warm and humid airflow. This is "returning to Nantian".