Last updated: June 2, 2025
In Chengtang, China, understanding the UV Index is crucial for safeguarding your skin and overall health. The UV Index measures the strength of ultraviolet (UV) radiation, and being aware of its levels can help prevent sunburn and long-term skin damage. With Chengtang's climate classified as Cfa, residents and visitors are often exposed to high UV levels, especially during midday when the index peaks at a striking 12. By keeping an eye on the UV Index, you can make informed decisions about sun protection, ensuring your time outdoors remains enjoyable and safe.
At dawn, the UV Index starts low at 1 around 07:00, making it a gentle introduction to the day. As the sun rises higher, the intensity increases rapidly, peaking at 12 by 12:00—perfect for sunbathers and outdoor enthusiasts seeking that golden glow. The midday sun commands attention, with values reaching 11 at 11:00 and 13:00, encouraging sun safety precautions. As the afternoon rolls in, the UV Index begins to wane, dropping to 9 at 14:00 and further to 4 by 16:00. By evening, the UV exposure diminishes significantly, settling back to 1 by 19:00, ushering in a gentle dusk. It’s essential to stay informed and safeguard against the sun’s rays, especially during those peak midday hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 8 | 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 | 7 | 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 experiences notable fluctuations throughout the year, with the highest values occurring from March to September. During these months, particularly from May to August, the UV Index reaches an extreme level of 12, indicating a significant risk of harm from unprotected sun exposure with a burn time as low as 10 minutes. High-risk months include March (9), April (10), and October (9), where the exposure is categorized as very high and the burn time is reduced to 15 minutes. Residents and visitors are strongly advised to take precautions during these periods, such as wearing sunscreen, protective clothing, and sunglasses, and seeking shade during peak sun hours to minimize the risk of sunburn and long-term skin damage. As winter approaches, the UV index gradually decreases, with December recording a moderate level of 5, allowing for more relaxed sun exposure guidelines.
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 |
| Chengtang | 6 | 7 | 9 | 10 | 12 | 12 | 12 | 12 | 11 | 9 | 7 | 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 |