Last updated: May 3, 2025
In Shangchewan, China, being aware of the UV Index is crucial for protecting your skin from harmful ultraviolet rays. Understanding UV levels is essential not only for preventing sunburn but also for maintaining overall skin health, especially in a climate characterized by hot summers and relatively high exposure risks. During peak hours, particularly between 11:00 AM and 1:00 PM, the UV Index can soar as high as 10, indicating extreme risks for skin damage. By staying informed about the daily UV levels and taking necessary precautions, residents and visitors alike can enjoy the sun safely while minimizing potential long-term health issues.
The UV Index throughout the day showcases a distinct rise and fall, reflecting the sun's intensity. Starting at a gentle 1 at 07:00, the index progressively climbs, hitting 2 by 08:00. As the day warms up, it reaches 4 at 09:00, surging to a peak of 10 by 12:00 and staying steady until 13:00. After peaking, the UV intensity begins to wane, dropping to 8 by 14:00, and continuing its descent to 6 at 15:00, before tapering off to 4 at 16:00, and finally returning to 1 by 18:00 and 19:00. This dynamic pattern highlights the importance of sun safety during peak hours, particularly from 11:00 to 13:00 when the UV Index is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits notable seasonal variations, peaking during the summer months. January and February present a high risk with a UV Index of 6, allowing for only 25 minutes of exposure before burns occur. As we transition into March and April, the risk escalates to a very high category (UV Index 8-10) with a reduced safe exposure time of 15 minutes. This trend continues into May before reaching its most critical peak in June and July, where the UV Index hits 11-12, classified as extreme, allowing just 10 minutes of safe sun exposure. Both August and September maintain a similar high risk before gradually decreasing in October to 8 and November to 7, marking a transition to lower risk months, culminating in December with a moderate category (UV Index 4) and a safer 30 minutes of burn time. Given this data, it is crucial for both visitors and residents to exercise caution and prioritize sun protection during the high-risk months of March through September, especially during summer when the UV exposure can be critical.
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 |
| Shangchewan | 6 | 6 | 8 | 10 | 10 | 11 | 12 | 12 | 10 | 8 | 7 | 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 |