Last updated: July 2, 2025
Understanding the UV Index in Shiwei, China is crucial for safeguarding your skin health and preventing sunburn. As residents of this Dwc climate zone experience varying UV levels throughout the day, monitoring these fluctuations can make all the difference during the sun's peak hours. For instance, from 12 PM to 1 PM, the UV Index soars to a high of 9, indicating extreme risk of harm from unprotected sun exposure. By staying informed about UV levels, you can take proactive measures to protect yourself and enjoy the sun safely in Shiwei.
The UV Index throughout the day showcases a dynamic pattern, peaking sharply at noon. Starting from a modest 2 at 07:00, it gradually climbs to 4 by 08:00 and reaches a notable 5 at 09:00. As the sun climbs higher, the intensity escalates, hitting a maximum of 9 at 12:00, before beginning its descent in the afternoon. The Index inches down to 8 from 13:00, then gently falls to 5 at 15:00, and continues its decline to 2 by 17:00. As the evening approaches, the UV levels taper off, settling at a low 1 by 19:00. This data emphasizes the importance of sun safety measures particularly during the midday hours when UV exposure is most critical.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences notable seasonal fluctuations, highlighting periods of both low and high exposure risk throughout the year. January and February present a low risk with indices of 1 and 2, allowing for 45 minutes of safe sun exposure. As we transition into March and April, the index climbs to 4 and 5, indicating a moderate risk where caution is advised after 30 minutes. May escalates to a high risk at 7, with a reduced safe exposure time of 25 minutes. From June to July, the UV Index peaks at 8 and 9, categorizing these months as very high risk, demanding only 15 minutes of safe exposure. August remains high at 7, while September and October see a return to moderate levels at 5 and 3. With November and December reverting back to a low risk of 2 and 1, offering 45 minutes of safe exposure, this data underscores that May through July are the highest-risk months. Visitors and residents are urged to take precautions during these peak months, such as seeking shade, wearing protective clothing, and applying sunscreen to mitigate the harmful effects of overexposure.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Shiwei | 1 | 2 | 4 | 5 | 7 | 8 | 9 | 7 | 5 | 3 | 2 | 1 |
| 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 |