Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Yancheng, China, where the sun's rays can be particularly intense, especially during the summer months. As a city located in a Cwa climate zone, Yancheng experiences a mix of humid subtropical weather, leading to varying UV exposure levels throughout the day. Awareness of UV levels is essential for sunburn prevention and maintaining skin health, as these indices can soar to a maximum of 11 around midday. By keeping an eye on the UV Index, you can take necessary precautions to protect your skin and enjoy the sun safely in this beautiful region.
The UV Index throughout the day exhibits a dynamic rise and fall in exposure, beginning at a low 1 at 07:00 and climbing steadily as the sun ascends. By 10:00, intensity spikes to 6, reaching its peak at noon with a striking 11—a critical level necessitating sun protection. This high UV exposure remains consistent until 13:00, after which a gradual decline ensues, dropping to 8 by 15:00. As the sun starts to set, the index softens to 3 by 17:00, further descending to a mild 1 by 19:00. It’s essential to stay cautious, particularly during the peak hours of 11:00 and 12:00, to safeguard against harmful rays.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences significant seasonal fluctuations, with the highest levels emerging from March to September. During these months, particularly in April, May, and June, the index peaks at 12 and falls within the extreme exposure category, culminating in a rapid burn time of just 10 minutes. March also starts the high-risk period with a UV Index of 8, while February brings a high value of 6. As summer wanes into August and September, the UV Index remains concerning at 10 and 11 respectively. Conversely, the offset months of January, November, and December present moderate to high UV exposure, but with burn times increasing to 30 minutes and 25 minutes. Visitors and residents are advised to take protective measures—such as wearing sunscreen, hats, and protective clothing—especially during the peak months of April to September to safeguard against harmful UV radiation.
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 |
| Yancheng | 5 | 6 | 8 | 11 | 12 | 11 | 11 | 10 | 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 |