Last updated: July 2, 2025
In Chengzi, China, staying informed about the UV Index is crucial for safeguarding your skin and overall health. Understanding UV levels not only helps in preventing sunburn but also plays a vital role in long-term skin health, reducing the risk of skin cancer and premature aging. With a Dwa climate, Chengzi experiences significant UV exposure, especially during peak hours from 11 AM to 1 PM, when the index reaches a maximum of 10. Being aware of these levels enables residents and visitors alike to take proactive steps to enjoy the sun safely.
As the day unfolds, the UV Index rises steadily, peaking at a remarkable 10 between noon and 1 PM, signaling the most intense sun exposure. Early risers at 7 AM will experience a minimal index of 1, making it a safe time for outdoor activities. However, as the clock ticks to 9 AM, the index climbs to 5, indicating a growing need for sun protection. By 11 AM, it escalates to a striking 9, urging everyone to seek shade or wear sunscreen if they venture outside. The afternoon sees a gradual drop, with levels falling to 4 by 4 PM, and the sun's strength continues to wane, reaching 1 by 7 PM. Overall, plan your outdoor activities around the sun's peak to ensure safety while enjoying the sunny day!
| 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 | 8 | very high | 15 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | 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 |
Throughout the year, the UV Index undergoes significant changes, indicating varying levels of sun exposure risk. January and December show a low UV Index of 2, with an extended burn time of 45 minutes. However, as we transition into February, the index rises to 4, marking the start of moderate exposure. The risk peaks from March to September, especially in the summer months of June and July, where the UV Index reaches 10—the highest category—with only a 15-minute burn time. These months—particularly from April to August—are categorized as very high risk, making them critical periods for protective measures. As the seasons change into October and November, the UV Index declines again to moderate levels. Visitors and residents are advised to take proactive measures during high-risk months, including using sunscreen, wearing protective clothing, and seeking shade, especially between noon and 4 PM when the sun's rays are strongest.
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 |
| Chengzi | 2 | 4 | 6 | 9 | 9 | 9 | 10 | 9 | 8 | 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 |