UV Index
UV Index
Today's UV index in Hong Kong, 
will be up to 11.8, 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 11.8 in Hong Kong 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.
Hong Kong's UV index can get very high, especially in summer, often reaching levels that are considered extreme, around 10 or more. It is lower in winter, usually between 1 and 3. The city experiences hot, humid summers with heavy rain from May to September. Winters are mild and dry, from December to February, with cooler temperatures and less humidity. Spring and autumn are transitional seasons with variable weather and moderate temperatures. Compared to nearby cities like Guangzhou and Shenzhen in China, Hong Kong tends to be more humid because it is by the sea. It is generally warmer and wetter than cities further north in China but cooler and less rainy than tropical countries like the Philippines or Malaysia.
See the UV index hour by hour for Hong Kong, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.