Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Saiyang, China, especially given the region's Cfa climate with its warm summers that can escalate UV levels dramatically. As the sun rises higher in the sky, the potential for sunburn and long-term skin damage increases significantly, making it essential to monitor UV levels throughout the day. With peak UV Index readings reaching 12 between noon and 1 PM, awareness of these fluctuations can help protect your skin and promote overall health—ensuring that outdoor activities remain safe and enjoyable under the sun. Whether you're lounging in the park or hiking nearby trails, understanding the UV Index can make all the difference in safe sun exposure.
As the day unfolds, the UV Index sees a dramatic rise, starting from a mild 1 at 07:00. By 09:00, it escalates to 6, signaling a greater need for sun protection. The sun reaches its zenith at 12:00, with a peak UV Index of 12, indicating extreme levels of ultraviolet radiation. Afterward, the intensity slightly declines, with 11 at 13:00 and decreasing to 9 by 14:00. The afternoon hours see a further drop, settling to 6 by 15:00, before tapering off to 2 at 17:00, and finally retreating to 1 from 18:00 to 19:00. This hourly data underscores the importance of being sun-smart, especially during those peak 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 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | 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 exhibits significant seasonal variations, peaking during the summer months. High-risk months include May through August, where the UV Index consistently reaches extreme levels of 11 or 12 and the burn time is as brief as 10 minutes. As such, residents and visitors should take precautionary measures during these peak months, such as seeking shade, wearing protective clothing, and applying sunscreen regularly. In contrast, the UV Index lowers during the fall and winter months, with January and November presenting high levels but more extended burn times of up to 25 minutes. It remains essential for everyone to stay informed about daily UV levels and adapt their sun protection habits accordingly, especially during the highest risk periods.
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 |
| Saiyang | 6 | 7 | 9 | 10 | 11 | 12 | 12 | 12 | 10 | 8 | 6 | 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 |