Last updated: August 1, 2025
Understanding the UV Index in Longtan, China, is crucial for protecting your skin and overall health. With UV levels peaking at a staggering 12 around midday, awareness of these readings can help prevent sunburn and long-term skin damage. Longtan, characterized by its humid subtropical climate, exposes residents and visitors to heightened UV risks, especially from late morning until early afternoon. By keeping an eye on the UV Index, you can enjoy the beautiful outdoors while safeguarding your skin against harmful rays.
The UV Index reveals a fascinating journey through the day, peaking dramatically as the sun reaches its zenith. Starting off with a mild index of 1 at 07:00, it gradually climbs, reaching 2 by 08:00. As the morning unfolds, the intensity surges, with a notable jump to 4 at 09:00, and skyrocketing to a striking 11 by 12:00. The highest level of 12 is recorded at 13:00, indicating the critical hour for sun exposure, before a gradual decline begins. By 14:00, it dips to 10, followed by a steady drop to 8 at 15:00, and continues to decrease into the evening. The UV Index settles back down to 1 by 18:00, tapering off into the night. It's a stark reminder of the sun's powerful influence, emphasizing the importance of sun safety during peak hours.
| 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 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV index levels fluctuate significantly, with high-risk months typically occurring from March to August. During these months, the UV index peaks at 12, indicating an extreme exposure category. Specifically, May, June, July, and August have the highest levels, necessitating a cautious approach with a burn time of just 10 minutes. As late spring transitions into summer, it’s crucial for both visitors and residents to take proactive measures such as wearing sunscreen, protective clothing, and seeking shade during peak hours. Conversely, in the colder months, particularly January and December, UV exposure is lower, with values categorized as moderate to high, allowing for more lenient sun safety practices. Overall, staying informed about UV levels and adjusting outdoor activities accordingly is essential for 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 |
| 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 |
| Longtan | 5 | 6 | 8 | 10 | 11 | 11 | 12 | 12 | 9 | 9 | 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 |