Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Longmen, China, where the sun can be exceptionally intense throughout the day. Given the Cfa climate of Longmen, which is characterized by warm summers, awareness of UV levels is essential for preventing sunburn and maintaining skin health. With midday UV Index values peaking at a formidable 12, the risk of harmful exposure significantly increases, making it vital to take precautions during the sunniest hours. Stay informed and protect your skin while enjoying the beautiful outdoors of Longmen!
The UV Index begins its rise at 7:00 AM with a low of 2, gradually climbing to a moderate 3 by 8:00 AM. By 9:00 AM, it reaches 6, but it's at 10:00 AM when the sun truly bears down, peaking at a high of 9. The intensity continues to soar, hitting a maximum of 12 at 12:00 PM, making it the most UV-active hour of the day. From there, it subtly declines, dropping back to 11 at 1:00 PM, and 9 at 2:00 PM. The afternoon brings relief as the index falls to 6 by 3:00 PM and continues to decrease, settling at 4 by 4:00 PM. As the day winds down, the UV Index dips to 2 by 5:00 PM and further to a safe 1 by 6:00 PM and stays consistent through 7:00 PM. Stay sun-smart and avoid peak UV hours for your skin's safety!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | 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 |
The UV Index demonstrates significant seasonal variation, peaking during the summer months. From January to February, the UV levels are high (index 6-7) with a burn time of 25 minutes. As spring approaches, the index rises sharply, reaching 9 in March and hitting a maximum of 12 in June and July, categorized as extreme, where the burn time decreases to just 10 minutes. Visitors and residents should be particularly cautious during the months of May through August, when the risk is highest; wearing protective clothing and applying sunscreen regularly is essential. As autumn arrives, the index starts to decrease, with a very high rating of 10 in September and lowering further to 6 by November. December offers slightly less UV exposure with a moderate index of 5 and a burn time of 30 minutes. Overall, vigilance is crucial during high-risk months, especially when outdoor activities are planned.
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 |
| Longmen | 6 | 7 | 9 | 10 | 11 | 12 | 12 | 11 | 10 | 8 | 6 | 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 |