Last updated: June 2, 2025
Understanding the UV Index in Haikou, China is essential for safeguarding your skin against harmful ultraviolet rays. With peak UV levels reaching a staggering 14 around midday, awareness of these fluctuating numbers can help you take necessary precautions to prevent sunburn and long-term skin damage. Given Haikou's tropical climate, the sun's intensity can significantly increase UV exposure risks, especially during the spring and summer months. By keeping an eye on the UV Index, you empower yourself to enjoy the beautiful outdoors safely while prioritizing your skin health.
As the sun rises, the UV Index begins its ascent, starting at a modest 1 by 07:00. By 08:00, it climbs to 2, signaling the first hints of sun exposure. The day's intensity peaks around 12:00, when the index reaches a blistering 13, a reminder to take precautions. It continues to soar, hitting its highest point at 13:00 with a strong 14, before gradually descending as the afternoon fades into evening. By 17:00, the index drops to 4, then retreats to a safe 1 by 19:00. This hourly dance of the UV Index underscores the importance of staying vigilant under the sun, especially during the midday hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 14 | extreme | 10 min |
| 14:00 | 13 | extreme | 10 min |
| 15:00 | 11 | extreme | 10 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences significant variability throughout the year, with January and February marking the beginning of a gradual rise, where levels reach a very high category. The risk intensifies dramatically from March to August, where the index peaks at 16 in July, indicating an extreme exposure category and a critical burn time of just 10 minutes. As summer transitions to early fall, September and October still maintain extreme levels, gradually decreasing but remaining a risk for sunburn. High-risk months, particularly from March to October, require visitors and residents to take proactive measures such as wearing protective clothing, applying sunscreen frequently, and seeking shade during peak hours to mitigate the increased likelihood of skin damage. In contrast, November and December see a return to very high and high exposure levels, respectively, with longer burn times, but still warrant caution. Overall, anyone spending time outdoors should be vigilant, particularly during the summer months when UV levels are at their highest.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beijing UVI | 2 | 3 | 5 | 8 | 9 | 9 | 10 | 9 | 7 | 6 | 4 | 2 |
| Chengdu UVI | 5 | 6 | 8 | 10 | 12 | 11 | 11 | 10 | 11 | 8 | 6 | 4 |
| Shanghai UVI | 5 | 6 | 8 | 10 | 10 | 11 | 12 | 11 | 11 | 8 | 6 | 4 |
| Guangzhou UVI | 7 | 9 | 11 | 12 | 13 | 13 | 13 | 12 | 11 | 10 | 9 | 7 |
| Shenzhen UVI | 7 | 10 | 12 | 12 | 14 | 13 | 13 | 13 | 12 | 11 | 9 | 7 |
| Haikou | 8 | 10 | 12 | 14 | 15 | 14 | 16 | 14 | 13 | 11 | 9 | 7 |