Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Cengang, China, especially given its Cfa climate zone, which typically features warm summers and moderate sun exposure. Monitoring UV levels is essential not just for sunburn prevention but also for long-term skin health—knowing when to seek shade or apply sunscreen can significantly reduce risks associated with harmful UV radiation. With midday UV Index values soaring to a maximum of 12, Cengang residents should stay informed about daily fluctuations to enjoy the sun safely while minimizing exposure risks.
The UV Index throughout the day reveals a striking pattern of intensity that peaks during midday hours. Starting at 07:00, the index begins at a low 2, gradually climbing to 4 by 08:00. As the sun rises higher, the index surges to 7 at 09:00 and hits a striking 10 at 10:00. The intensity reaches its zenith at 11:00 with an impressive 11, just before noon, peaking at 12 by 12:00—the most critical time for sun exposure. The afternoon sees a decline, dropping to 11 at 13:00 and then gradually easing to 9 by 14:00. By late afternoon, the index continues to fall, reaching 6 at 15:00, and dropping to 3 by 16:00. The evening brings a significant drop, as the index settles at 1 by 17:00, further decreasing to 0 by the end of the day at 19:00. This fluctuation emphasizes the importance of sun protection during the peak hours of 10:00 to 14:00.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 10 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal variations, peaking during the summer months. High-risk months include May through August, where the UV Index consistently reaches extreme levels of 11 or 12 and the burn time is as brief as 10 minutes. As such, residents and visitors should take precautionary measures during these peak months, such as seeking shade, wearing protective clothing, and applying sunscreen regularly. In contrast, the UV Index lowers during the fall and winter months, with January and November presenting high levels but more extended burn times of up to 25 minutes. It remains essential for everyone to stay informed about daily UV levels and adapt their sun protection habits accordingly, especially during the highest risk periods.
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 |
| Cengang | 6 | 7 | 9 | 10 | 11 | 12 | 12 | 12 | 10 | 8 | 6 | 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 |