UV Index
UV Index
Today's UV index in Haikou, China 
will be up to 12.3, indicating a extreme level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-06-01
UV index at 12.3 in Haikou means extreme risk: limit outdoor time especially from 10 a.m. to 4 p.m., actively seek shade, wear protective clothing, broad-brimmed hat, apply SPF 30+ sunscreen every 2 hours, and wear UV-blocking sunglasses. Watch for bright surfaces like water and snow increasing UV exposure.
The UV index in Haikou is generally high, especially from March to September, often reaching levels between 8 and 11, indicating strong sun exposure during these months.
Haikou experiences a tropical monsoon climate with hot, humid summers from May to October and mild, dry winters from November to April. Rainfall peaks in the summer, while winters remain relatively dry and cooler.
Compared to northern China, Haikou is warmer year-round and receives more rainfall. It is sunnier and drier in winter than other parts of Hainan Island and generally sunnier than neighboring coastal areas in Southeast Asia.
See the UV index hour by hour for Haikou, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.