Last updated: May 3, 2025
In Nantianhu, China, being aware of the UV Index is crucial for protecting your skin from harmful sun exposure. Understanding UV levels allows residents and visitors to take proactive measures against sunburn, ensuring long-term skin health while enjoying the beautiful outdoors. With a Cfa climate that features warm summers and significant sunlight, Nantianhu experiences peak UV Index levels reaching 12 during midday hours, highlighting the increased risk of skin damage. By staying informed about current UV levels, you can enjoy your time in Nantianhu while keeping your skin safe and healthy.
At dawn, the UV Index starts off gently, peaking at just 1 by 7:00 AM. As the sun climbs higher, its intensity increases rapidly, reaching 4 by 9:00 AM and striking 10 by 11:00 AM—a clear warning to seek shade or slather on sunscreen. The highest reading of 12 occurs at both noon and 1:00 PM, indicating peak solar intensity. Fortunately, as afternoon approaches, the index begins to wane, dropping to 8 by 3:00 PM and further declining to below 5 by 4:00 PM. By the time 7:00 PM rolls around, the UV danger has diminished significantly, settling back to a safe 1. Stay protected during those intense 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 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index displays significant seasonal changes, indicating varying levels of sun exposure risk throughout the year. January and February start with a high UV Index (6-7) where unprotected skin can burn within 25 minutes. The risk escalates dramatically from March to September, peaking in July with an extreme UV Index of 13 and a burn time of just 10 minutes. Visitors and residents should take extra precautions during these summer months, ensuring they wear adequate sunscreen and protective clothing. In contrast, October and November see a decrease in UV levels (9 and 7, respectively), but caution is still necessary as burn times remain relatively short at 15-25 minutes. By December, the UV Index lowers to 5, categorizing exposure as moderate, allowing more time—30 minutes—before burning occurs. It’s essential for everyone to stay informed on local UV levels and adjust sun safety practices accordingly throughout the year.
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 |
| Nantianhu | 6 | 7 | 10 | 11 | 12 | 12 | 13 | 12 | 11 | 9 | 7 | 5 |
| 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 |