Last updated: July 2, 2025
In Yanmenguan, China, understanding the UV Index is crucial for safeguarding your skin from harmful ultraviolet rays. With the sun reaching its peak strength at noon with an alarming UV Index of 11, awareness of UV levels can make all the difference in preventing sunburn and promoting overall skin health. The region's Dwb climate, characterized by hot summers and cool winters, presents unique challenges when it comes to solar exposure. By staying informed about daily UV fluctuations—especially during late morning and early afternoon—residents can take proactive steps to protect themselves, enjoy the outdoors safely, and maintain their well-being under the sun.
As the sun rises, the UV Index begins its ascent, starting at a low 1 at 07:00. By 08:00, it climbs to a moderate 3, signaling the first hints of intensity. The 09:00 hour sees a notable increase to 5, but it’s 10:00 that brings a significant jump to 7. The zenith of the day arrives at 12:00, where the UV Index peaks at an intense 11—a cautionary call for sun safety. As the afternoon progresses, the numbers recede, with 10 at 13:00, and gradually decreasing to 7 by 15:00. The evening settles in gently, bringing the UV Index down to 3 by 17:00, and returning to its morning levels at 1 by 18:00, continuing through to 19:00. Stay protected during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 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 |
Throughout the year, the UV Index exhibits significant variation, with the highest risk typically occurring from April to September. April sees a spike to 9 (very high), while May reaches an extreme 10. The intense UV exposure peaks in June and July at 11 (extreme), necessitating precautions to prevent skin damage; under such high levels, the burn time is reduced to just 10 minutes. As summer transitions into early fall, the index remains high, with August at 10 and September dropping slightly to 8 (very high). Advisory for visitors and residents: during peak months, particularly June, July, and August, ensure to seek shade, wear protective clothing, and apply a high SPF sunscreen regularly to mitigate the risks associated with UV exposure. The UV Index then gradually decreases through the fall and winter months, reaching a safer level of 2 in December.
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 |
| Yanmenguan | 3 | 4 | 6 | 9 | 10 | 11 | 11 | 10 | 8 | 7 | 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 |