Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Sangmu, China, where the climate typically falls within the Cfa zone, bringing warm summers and ample sunshine. Keeping an eye on UV levels not only helps in preventing sunburn but also plays a key role in maintaining overall skin health. With UV Index readings peaking at a high of 13 between noon and 1 PM, it’s essential for locals and visitors alike to be aware of sun exposure risks during these peak hours to ensure safe outdoor activities and protect against harmful UV rays.
The UV Index throughout the day showcases a dynamic pattern of sun intensity. At 7:00 AM, the index begins at a modest 1, gradually rising as the sun climbs higher in the sky. By 10:00 AM, it reaches 7, illustrating a marked increase in exposure. The peak occurs at 12:00 PM, hitting a striking 12, making it essential to seek shade or wear protective gear. The intensity remains high at 1:00 PM, reaching 13, before starting to decline after 2:00 PM, dropping to 9 by 3:00 PM. The late afternoon sees further decrease, settling at 3 by 5:00 PM and tapering off to 1 by the evening. Overall, this data underscores the importance of vigilant sun safety during the midday hours when UV exposure is at its most potent.
| 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 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index levels vary significantly, peaking during the summer months. January starts with a high UV Index of 6, with a burn time of 25 minutes, but by February and March, it escalates to 8 and 9, respectively, both categorized as very high, and reducing burn time to 15 minutes. As we transition into April and May, the UV Index hits an extreme level of 12, where the burn time shortens to just 10 minutes. This extreme level continues through July and August, maintaining a UV Index of 13. September sees a slight decline to 11 but remains in the extreme category, while October returns to very high at 10. November and December finally give a reprieve with lower indices of 7 and 5, respectively. Therefore, the high-risk months for sun exposure are from April to September, where the UV Index is at its highest, urging visitors and residents to take protective measures, such as wearing sunscreen, sunglasses, and protective clothing, and limiting sun exposure during peak hours for safety.
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 |
| Sangmu | 6 | 8 | 9 | 12 | 12 | 13 | 13 | 13 | 11 | 10 | 7 | 5 |
| 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 |