Last updated: May 3, 2025
Understanding the UV Index is crucial in Longmen, China, where the subtropical climate brings significant exposure to harmful ultraviolet radiation. Awareness of UV levels not only helps in preventing painful sunburns but also plays a vital role in maintaining long-term skin health. With peak UV readings often soaring to 13 during midday, residents and visitors should be vigilant about sun protection to mitigate the risks associated with high UV exposure, especially between the hours of 10 AM and 2 PM when the sun's intensity is at its highest. By staying informed about the UV Index, you can enjoy the beautiful outdoor climate of Longmen while safeguarding your skin.
The UV Index during the day reveals a notable peak in sun exposure. Starting at 07:00 with a gentle 1, it gradually climbs to 2 by 08:00. As the sun rises higher, the index surges dramatically, hitting 5 at 09:00, and reaching a striking 8 by 10:00. The intensity peaks at 12:00 with a scorching 13, remaining high until 13:00. After that, it starts to decline, returning to 11 at 14:00 and falling to 8 by 15:00. As the afternoon wanes, the index drops to 5 at 16:00, and finally settles back to 1 by 18:00 and 19:00. This data highlights the importance of sun safety measures during the midday hours when UV exposure is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences significant seasonal changes, peaking during the summer months. January and February have a very high UV Index of 8 and 10, respectively, with a burn time of just 15 minutes. However, starting from March, the UV Index escalates to an extreme level of 12 and continues at 13 through June, with the highest reading of 14 in July and August—both having a burn time of only 10 minutes. The fall months of September and October see a slight decline, dropping back to 12, while November and December return to 9 and 8, respectively, maintaining a very high risk. Residents and visitors should be especially cautious during the high-risk months of March through October, adopting sun protection measures like wearing sunscreen, hats, and sunglasses, and seeking shade when necessary to minimize burn risk.
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 |
| 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 |
| Longmen | 8 | 10 | 12 | 13 | 13 | 13 | 14 | 14 | 12 | 12 | 9 | 8 |