Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Chengjia, China, especially given the region's Cfa climate that brings warm summers and potential for high solar exposure. Being aware of UV levels not only helps in preventing sunburn but also plays a significant role in protecting long-term skin health. The UV data indicates peak levels soaring as high as 13 between noon and early afternoon, signaling an increased risk of harm from unprotected sun exposure. Whether you're enjoying the outdoors or simply passing through, knowing how to navigate these UV ratings is essential for safeguarding your skin from the harmful effects of ultraviolet radiation.
From 07:00 to 19:00, the UV Index exhibits a pronounced peak during midday hours, soaring to 13 between 12:00 and 13:00. The intensity rises steadily from a mild 1 at 07:00 to a substantial 12 at 11:00, indicating peak sun exposure just before noon. As the afternoon progresses, the index gradually declines, dropping to 5 by 16:00 and further to a safe 1 as the sun sets. With a dramatic increase during the late morning and early afternoon, it's crucial to stay protected against UV rays, especially when the index hits 9 and above between 10:00 and 14:00.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 12 | 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 |
Throughout the year, UV levels fluctuate significantly, with the highest risk months occurring from March to September, where the UV Index reaches an extreme level of 12-13 and a burn time as short as 10 minutes. Specifically, February marks a transition to very high levels, while October and November also present very high levels but with slightly longer burn times of 15 minutes. During these months, it is crucial for visitors and residents to remain vigilant about sun exposure; it is advisable to wear protective clothing, apply sunscreen regularly, and seek shade during peak hours. Conversely, the low-risk months of December and January see a significant drop in UV exposure, although caution is still recommended due to the high levels present in January. Planning outdoor activities with these UV changes in mind can help ensure safety and comfort 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 |
| Guangzhou UVI | 7 | 9 | 11 | 12 | 13 | 13 | 13 | 12 | 11 | 10 | 9 | 7 |
| Chengjia | 7 | 9 | 12 | 12 | 13 | 13 | 13 | 13 | 11 | 10 | 9 | 6 |
| Shenzhen UVI | 7 | 10 | 12 | 12 | 14 | 13 | 13 | 13 | 12 | 11 | 9 | 7 |