Last updated: June 2, 2025
In Changzheng, China, staying informed about the UV Index is crucial for protecting your skin and overall health as you enjoy the sunny days characteristic of its Am climate. Understanding UV levels helps you prevent sunburn and reduce long-term skin damage, especially during peak hours when the index can soar to a staggering 13 by noon. With intense UV exposure risks prevalent, being mindful of the UV Index empowers you to take necessary precautions like wearing sunblock and limiting outdoor activities during the hottest parts of the day, ensuring your time in the sun remains safe and enjoyable.
The UV Index during the day reveals a notable peak in sun exposure. Starting at 07:00 with a gentle 1, it gradually climbs to 2 by 08:00. As the sun rises higher, the index surges dramatically, hitting 5 at 09:00, and reaching a striking 8 by 10:00. The intensity peaks at 12:00 with a scorching 13, remaining high until 13:00. After that, it starts to decline, returning to 11 at 14:00 and falling to 8 by 15:00. As the afternoon wanes, the index drops to 5 at 16:00, and finally settles back to 1 by 18:00 and 19:00. This data highlights the importance of sun safety measures during the midday hours when UV exposure is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Seasonal changes in UV exposure reveal a pronounced peak during the warmer months, particularly from March to October, where the UV Index remains in the extreme category (ranging from 13 to 14), with a notably high risk of skin damage in just 10 minutes of sun exposure. February and January also present significant risks, with UV Indexes of 11 and 9 respectively, suggesting more caution in these months as well, especially for outdoor activities. November and December see a reduction in UV intensity, but the Index remains at a very high level of 9 and 8, indicating that even in winter, protective measures against UV exposure are necessary. Visitors and residents are advised to prioritize sun safety during these high-risk months by wearing protective clothing, applying sunscreen regularly, and limiting time in direct sunlight, particularly during midday hours when the sun’s rays are strongest.
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 |
| Changzheng | 9 | 11 | 13 | 13 | 14 | 13 | 14 | 14 | 13 | 12 | 9 | 8 |