Last updated: June 2, 2025
Understanding the UV Index in Shiwei, China, is crucial for ensuring your skin's health and preventing sunburn. With a climate characterized by a Dwc zone, residents and visitors are often exposed to varying levels of UV radiation throughout the day. Notably, the UV Index in Shiwei can peak at 8 around midday—heightening the risk of skin damage. By being aware of these UV levels, you can take proactive measures to protect yourself from harmful effects, enabling you to enjoy the sun while safeguarding your skin.
The UV Index starts off gently at 2 by 7:00 AM, gradually climbing to a peak of 8 from 11:00 AM to 12:00 PM. As the day progresses, the intensity begins to wane, with readings of 7 at 1:00 PM, followed by 6 at 2:00 PM. By the afternoon, the UV levels decrease to 5 at 3:00 PM, tapering off further to 3 by 4:00 PM, and then gently declining to 1 by 6:00 PM. This hourly data illustrates a typical sunlit day, emphasizing the importance of sun protection during the peak daylight hours when the UV Index is highest. Enjoy the sun, but be mindful!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 6 | 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 |