Last updated: July 2, 2025
Awareness of the UV Index is crucial for residents and visitors of Changjiang, China, where the subtropical humid climate presents unique challenges to skin health. Understanding UV levels is essential to prevent sunburn and reduce the risk of long-term skin damage. With peak UV indices reaching as high as 11 around midday, individuals must remain vigilant during outdoor activities, especially given the intense sun exposure typical of the region's summers. By staying informed about daily UV levels, you can protect yourself and enjoy the sunny days of Changjiang with confidence!
The UV Index throughout the day reveals a dramatic rise in sun intensity, peaking during the late morning to early afternoon. Starting the day at a modest 2 at 7:00 AM, the index climbs steadily, reaching 11 by 11:00 AM and maintaining that level until 1:00 PM. This signifies a high risk of harm from unprotected sun exposure. Following this peak, the index begins to dip, dropping to 8 by 2:00 PM, and continuing its decline until it falls to 0 by 7:00 PM. With this information, it's crucial to take sun safety precautions—especially during the hours when the UV Index is at its highest!
| 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 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | moderate | 30 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 |
As the seasons change, so do UV levels, significantly impacting sun safety. January starts with a UV Index of 4, categorized as moderate, allowing for approximately 30 minutes of unprotected sun exposure. This rises sharply through February and March, reaching 6 (high) and 8 (very high), respectively, with burn times dropping to 25 and 15 minutes. The peak months, July and August, see an extreme UV Index of 11, where the burn time is reduced to a mere 10 minutes. As fall approaches, the UV Index decreases to 10 in September, then 8 in October. By November and December, the UV Index returns to 6 and 4, respectively, allowing for safer exposure times of 25 and 30 minutes. Visitors and residents should remain vigilant during the high-risk months of March to October, especially in the peak summer months, and take appropriate precautions such as wearing sunscreen, protective clothing, and seeking shade during peak hours.
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 |
| Changjiang | 4 | 6 | 8 | 10 | 10 | 10 | 11 | 11 | 10 | 8 | 6 | 4 |
| 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 |