Last updated: June 2, 2025
In Gengwan, China, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn. Understanding local UV levels not only helps you decide when to seek shade but also equips you with the knowledge to protect yourself against the harmful effects of ultraviolet radiation. With a BSk climate, Gengwan experiences distinct seasonal variations, yet the UV exposure can be surprisingly high, particularly during midday hours when levels reach up to 12. By monitoring the UV Index, residents can enjoy the outdoors safely while minimizing the risks associated with prolonged sun exposure.
The UV Index throughout the day shows a dynamic trend, starting from a modest 1 at 07:00. As the sun rises higher, the index climbs steadily, reaching 3 by 08:00 and hitting a notable 5 at 09:00. The peak intensity occurs during midday, where it spikes to a staggering 12 around 13:00, signaling a critical time for sun exposure precautions. As the afternoon progresses, the index begins to decline, dropping to 9 at 15:00, further easing to 6 by 16:00. By 17:00, it settles back to 3, and as evening approaches, it recedes to a gentle 1 by 19:00. This data emphasizes the importance of protecting your skin during the peak hours of sunlight, particularly between 11:00 and 14:00.
| 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 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index levels exhibit notable seasonal changes, peaking in the summer months. April to August represents the highest risk period, with May and June experiencing the peak UV Index of 12, classified as extreme, meaning an exposure time of only 10 minutes can lead to skin damage. March introduces high UV levels at 7, while September slightly reduces to 9, still within the very high category. Conversely, winter months such as January, February, November, and December maintain a moderate UV Index of 3 to 5, allowing for 30 minutes of exposure with careful precautions. Visitors and residents are advised to take protective measures from March to September: seek shade, wear protective clothing, and apply broad-spectrum sunscreen, especially during the extreme months of May to August when the risk of harm is significantly elevated.
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 |
| Gengwan | 3 | 5 | 7 | 10 | 11 | 12 | 12 | 11 | 9 | 7 | 4 | 3 |
| 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 |