Last updated: August 1, 2025
Understanding the UV Index is crucial for residents of Yanshan, China, where the sun's rays can pose significant health risks, especially during peak hours. With a climate classified as Dwa, the region experiences distinct seasonal variations, leading to varying UV exposure levels throughout the year. Being aware of UV levels—especially when they soar to a maximum of 11 between 11:00 AM and 1:00 PM—can help you take preventive measures against sunburn and long-term skin damage. By staying informed about the daily UV Index, you can enjoy the sun safely while protecting your skin and overall health.
As the day unfolds, the UV Index reaches its peak during the late morning and early afternoon hours. Starting at a modest 2 by 07:00, the intensity steadily climbs, hitting 3 by 08:00 before surging to 6 by 09:00. The sun truly asserts itself around 10:00, where the index soars to 8, and by 11:00, it hits a striking 11—the maximum for the day. This intense UV exposure remains consistent until 13:00, when conditions maintain an index of 11. Gradually, the UV rays start to wane, dropping to 9 by 14:00, then further declining to 6 at 15:00. In the late afternoon and evening, the index recedes to 4 at 16:00, followed by 2 at 17:00, tapering off to a gentle 1 by 18:00 and 19:00. It's a perfect reminder to stay vigilant about sun protection during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 9 | 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 |
Throughout the year, UV radiation exposure varies significantly, with higher levels typically occurring from March to October. High-risk months for UV exposure include April through August, when the UV Index peaks at 10 in May and June and reaches 11 in July. During these months, the burn time decreases sharply to as little as 10 minutes in July, underscoring the need for increased caution. Residents and visitors are advised to take protective measures during this period, such as wearing sunscreen, protective clothing, and sunglasses, while seeking shade to minimize exposure during peak sunlight hours.** In contrast, months like January and December present a lower risk with UV Index values of 2, allowing for more extended sun exposure (up to 45 minutes) without significant risk of burning. As such, awareness of seasonal changes in UV levels is crucial for maintaining skin health year-round.
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 |
| Yanshan | 2 | 4 | 6 | 8 | 10 | 10 | 11 | 9 | 8 | 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 |