Last updated: August 1, 2025
Understanding the UV Index is essential for residents and visitors of Shanhaiguan, China, where the Dwa climate can lead to significant sun exposure. With peak UV levels reaching as high as 11 around noon, being aware of these fluctuations is crucial for preventing sunburn and protecting skin health. As outdoor activities and tourism thrive in this picturesque coastal city, knowing how to manage UV risks can ensure everyone enjoys the beautiful environment without compromising their well-being. Be proactive and stay informed about the UV Index for a safer, healthier experience under the sun.
The UV Index throughout the day exhibits a distinct pattern, peaking at a startling 11 at noon, indicating very high sun exposure. As the sun rises, the index grows gradually from a modest 2 at 7:00 AM to a 6 by mid-morning. The intensity reaches its zenith at 11:00 AM with a 10, making it crucial to seek shade or wear sun protection. In the early afternoon, the index maintains a high level at 10, before gradually declining to 6 by 3:00 PM and tapering off to 1 by 7:00 PM. This data underscores the importance of midday sun safety, reminding everyone to take precautions when UV levels are highest.
| 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 | 10 | 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 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences notable fluctuations throughout the year, with high-risk months identified from March to July, where the risk of harm from unprotected sun exposure significantly increases. In March, the UV Index hits 6 (high), prompting a burn time of only 25 minutes, while April and May maintain an index of 8 (very high) with a reduced burn time of just 15 minutes. The peak occurs in July, reaching an extreme index of 11, where the burn time shrinks to just 10 minutes. Following this, August remains very high at an index of 10, before gradually declining in September and October to indices of 7 and 6, respectively. Visitors and residents are strongly advised to take precautions during these high-risk months, such as seeking shade, wearing protective clothing, and applying sunscreen frequently, to safeguard themselves from the harmful effects of UV exposure.
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 |
| Shanhaiguan | 2 | 4 | 6 | 8 | 8 | 10 | 11 | 10 | 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 |