Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Yunnanyi, China, as it plays a vital role in protecting skin health and preventing sunburn. With a Cwb climate characterized by its unique seasonal variations, Yunnanyi experiences fluctuating UV exposure throughout the day. Notably, peak UV levels can soar to a staggering 15 between 1 PM and 2 PM, making it essential to stay informed about daily UV predictions. Being aware of these levels empowers you to take necessary precautions, ensuring your outdoor activities remain enjoyable and safe.
As the day unfolds, the UV Index begins its ascent, starting from a mild 1 at 7:00 AM. By 9:00 AM, it reaches a 3, signaling that protection is becoming increasingly important. The real intensity kicks in around 11:00 AM, when the index soars to 11 and peaks at a scorching 15 from 1:00 PM to 2:00 PM—the perfect time for sun safety precautions! As the afternoon wanes, the index gradually declines to 5 by 5:00 PM, reminding us that even as the sun sets, vigilance is key. By 7:00 PM, the UV Index returns to 1, making the evening more forgiving. Stay sun smart and enjoy your day safely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 14 | extreme | 10 min |
| 13:00 | 15 | extreme | 10 min |
| 14:00 | 15 | extreme | 10 min |
| 15:00 | 12 | extreme | 10 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index displays significant seasonal changes, peaking during spring and summer months. From March through October, the UV Index reaches extreme levels, particularly in May through August, where it consistently remains at 15. The highest risk months are March to August, with a notably brief burn time of just 10 minutes in this period. Conversely, January and February also pose risks with very high UV Index values of 8 and 9, allowing for slightly longer burn times of 15 minutes. As such, it is essential for visitors and residents to take precautions during these peak months, including seeking shade, wearing protective clothing, and applying sunscreen to reduce the risk of skin damage. In contrast, November and December offer some respite with lower indices, yet caution is still advised, especially in November with a UV index of 9.
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 |
| 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 |
| Yunnanyi | 8 | 9 | 12 | 13 | 15 | 14 | 15 | 15 | 14 | 12 | 9 | 7 |