Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Yangzi Jianglu, China, where the BSk climate can bring significant sun exposure. With peak UV levels reaching as high as 10 during midday hours, awareness of these UV ratings is essential for preventing sunburn and maintaining long-term skin health. By understanding how UV levels fluctuate throughout the day, you can take proactive measures to protect yourself and enjoy the sunny days safely. Remember, even on seemingly mild days, the risk of UV damage can be high, making it important to stay informed and prepared.
At dawn, the UV Index starts modestly at 2 at 7:00 AM. As the sun rises, the intensity quickly climbs, reaching 4 by 8:00 AM and peaking at an impressive 10 between 11:00 AM and 1:00 PM. This period demands caution, as the midday sun delivers its strongest rays. By 2:00 PM, there's a slight decline to 9, which continues to taper off through the afternoon. As the day winds down, the UV Index drops to 6 at 3:00 PM and further down to 4 by 4:00 PM. The evening brings relief, with levels declining to 2 by 5:00 PM and settling at a comfortable 1 from 6:00 PM onward. Keep this trend in mind for safe sun exposure!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 9 | 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 does the UV Index, impacting sun exposure and skin safety. January and December see a low UV Index of 2, allowing for safer outdoor activities with a burn time of 45 minutes. However, as we progress into February, the UV Index rises to 4 (moderate), with a burn time reduced to 30 minutes. The risk escalates sharply from March to April, where the UV Index reaches 6 (high) and 8 (very high), respectively, demanding more vigilant sun protection. The peak months of May through August experience extreme UV levels of 10 and 9, requiring minimized sun exposure with a mere 15 minutes burn time. After August, the risk gradually decreases, with September at 7 (high) and October at 5 (moderate). During the fall and winter months, residents and visitors should remain cautious but can enjoy the sun safely with proper precautions, especially during high-risk months of April through August. Always apply sunscreen, wear protective clothing, and seek shade during peak hours to minimize UV exposure.
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 |
| Yangzi Jianglu | 2 | 4 | 6 | 8 | 10 | 10 | 10 | 9 | 7 | 5 | 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 |