Last updated: June 2, 2025
Understanding the UV Index in Yanchiwan, China is crucial for protecting your skin and overall health. With the region’s climate characterized by cool summers and significant UV exposure, awareness of UV levels helps in preventing sunburns and long-term skin issues. On a typical day, the UV Index can peak at an intense 14 around midday, posing an elevated risk for harmful effects from sun exposure. By staying informed about these levels, residents and visitors alike can take necessary precautions to enjoy the sun safely while safeguarding their skin health.
The UV Index throughout the day reveals a significant rise in solar intensity, peaking during the midday hours. At 07:00, the index starts modestly at 1, but by 08:00, it climbs to 2. As the sun rises higher, the index soars to 4 by 09:00, hitting a striking 7 at 10:00. The real intensity arrives around 11:00, where it reaches an impressive 10, and by 12:00, it peaks at 13. The highest value of 14 is maintained from 13:00 to 14:00, marking the hours when sun safety is most crucial. As the afternoon wanes, the index dips to 12 at 15:00, and continues to decline to 6 by 17:00. By 18:00, it drops further to 4, indicating a much lower risk, and concludes the day at 2 by 19:00. This data underscores the importance of sun protection during the peak hours around midday.
| 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 | 13 | extreme | 10 min |
| 13:00 | 14 | extreme | 10 min |
| 14:00 | 14 | extreme | 10 min |
| 15:00 | 12 | extreme | 10 min |
| 16:00 | 10 | very high | 15 min |
| 17:00 | 6 | high | 25 min |
| 18:00 | 4 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, UV Index levels demonstrate significant seasonal variation, with the highest risk occurring from March to September. March showcases a sharp rise to a UV Index of 10, categorized as very high, reducing burn time to just 15 minutes. This increase continues to peak in May at an alarming 15 (extreme), where a mere 10 minutes of exposure can lead to burns. Visitors and residents should be particularly cautious during these months, ensuring they seek shade, wear protective clothing, and apply broad-spectrum sunscreen regularly. October marks a gradual decline, with a UV Index of 8 (very high), before dropping to more moderate levels in the winter months of November and December, where the UV Index returns to 5 and 3, respectively, allowing for longer exposure times of 30 minutes without significant risk. Thus, while winter months pose lower UV threats, vigilance is encouraged during spring and summer for optimal skin health.
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 |
| Yanchiwan | 3 | 6 | 10 | 12 | 15 | 14 | 14 | 13 | 11 | 8 | 5 | 3 |
| 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 |