Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Chengzhai, China, where the Dwa climate brings both beautiful sunshine and significant UV exposure risks. Awareness of UV levels helps prevent sunburn and protects long-term skin health, ensuring that outdoor activities can be enjoyed safely. With peak UV Index values reaching a maximum of 10 around noon, it's essential to stay informed about daily UV fluctuations and take necessary precautions. Whether you're soaking in the sun or enjoying the city's amenities, knowing the UV Index can make all the difference in safeguarding your skin.
As the sun rises, the UV Index gradually transitions from a mild 1 at 07:00 to an invigorating 3 by 08:00. The peak UV intensity hits its stride between 12:00 and 13:00, reaching a striking 10, a clear call for sun protection. As the afternoon progresses, the index begins to decline, tapering off to 8 at 14:00, 6 at 15:00, and eventually settling to a gentle 2 by 17:00. By evening, the UV levels dip back down, returning to a safe 1, indicating it's time to relax and enjoy the cooler, softer light of sunset.
| 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 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, so do the UV Index levels, significantly influencing sun exposure risk. In the winter months of January and December, the UV Index is low (2), allowing for longer exposure times of up to 45 minutes without burning. February marks a transition to moderate exposure (UV Index 4) with a burn time of 30 minutes. However, from March through September, the UV Index escalates, peaking at 10 during June and July, indicating very high exposure risk and a burn time of only 15 minutes. The high-risk months are clearly defined between April and August, when the UV Index remains consistently high to very high. With decreasing UV levels in the fall, October sees a high UV Index of 6, while November returns to moderate levels. For visitors and residents, it is crucial to adopt sun safety measures—such as using sunscreen, wearing protective clothing, and seeking shade—especially during the most dangerous months of April to August. Stay informed and protect your skin to enjoy the sun safely!
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 |
| Chengzhai | 2 | 4 | 6 | 8 | 9 | 10 | 10 | 9 | 8 | 6 | 3 | 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 |