Last updated: May 3, 2025
Understanding the UV Index in Shiwei, China is crucial for maintaining skin health and preventing sunburn, especially given the region's Dwc climate that can lead to varying UV exposure risks throughout the day. As UV levels peak around mid-day, with a maximum index of 7 between 11:00 AM and 12:00 PM, staying informed can help residents and visitors alike plan their outdoor activities responsibly. By being aware of the UV Index, individuals can take necessary precautions such as seeking shade, wearing protective clothing, and applying sunscreen, ensuring their skin remains safe from harmful radiation while enjoying the beautiful landscapes of Shiwei.
The UV Index throughout the day reveals a clear peak in solar intensity, with maximum exposure occurring between 11:00 AM and 12:00 PM, where values hit 7. As the morning unfolds, 07:00 AM starts at a low 2, gradually climbing to 3 by 08:00 AM and reaching 4 by 09:00 AM. A noticeable surge occurs at 10:00 AM, with the index jumping to 6, before peaking at 7 during the late morning to early afternoon hours. As the afternoon progresses, the index begins to taper off, dropping to 6 by 1:00 PM, then declining steadily back to 4 by 3:00 PM, and sinking further to 1 by 6:00 PM, where it remains until sunset. This data highlights the importance of sun protection during those peak hours, especially around midday when UV exposure is highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 5 | moderate | 30 min |
| 15:00 | 4 | 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 |