Last updated: July 2, 2025
Understanding the UV Index in Yili, China is crucial for safeguarding your skin and overall health. The UV levels can quickly escalate, reaching a maximum of 9 around midday, which emphasizes the need for vigilance to prevent sunburn and long-term skin damage. Given Yili’s Dfb climate, characterized by distinct seasonal changes, residents and visitors alike should be aware of the unique sun exposure risks throughout the year. By staying informed about UV levels, you can take proactive steps to protect yourself and enjoy the outdoors safely.
The UV Index throughout the day presents a clear pattern of increasing intensity, peaking during midday. At 07:00, the index starts at a low 1, perfect for early risers. As the sun climbs higher, it reaches 3 by 08:00 and 4 by 09:00. The real intensity strikes between 10:00 and 13:00, with values soaring to 6, then peaking at a sizzling 9 at 12:00 and 13:00. Post-lunch, a gradual decline begins—falling to 8 at 14:00, 7 at 15:00, and down to 5 by 16:00. As daylight fades, the UV Index drops significantly, returning to a 3 by 17:00, and then settling back down to a safe 1 by 18:00 and 19:00. Be sure to enjoy the sunshine safely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 7 | high | 25 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, seasonal UV changes significantly affect sun exposure safety. From January to February, the UV Index gradually increases from a low of 2 to a moderate 4, allowing for longer burn times of 45 minutes to 30 minutes, respectively. As spring progresses, March and April see the UV Index rise to high levels (6 and 7), shortening safe exposure time to 25 minutes. The summer months of May to August are particularly critical, with very high UV levels peaking at 10 in June and remaining above 8, requiring protective measures for just 15 minutes of sun exposure. In early September, the UV Index decreases to high levels again, providing a brief respite with longer burn time opportunities. As autumn settles in, the UV exposure becomes moderate in October and November, before returning to low in December, where burn times increase to 30 and 45 minutes. Visitors and residents are advised to take special precautions during the high-risk months of May, June, July, and August—including wearing sunscreen, protective clothing, and seeking shade to minimize potential skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yili | 2 | 4 | 6 | 7 | 9 | 10 | 9 | 8 | 7 | 5 | 3 | 2 |
| 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 |
| Shenzhen UVI | 7 | 10 | 12 | 12 | 14 | 13 | 13 | 13 | 12 | 11 | 9 | 7 |