Last updated: August 1, 2025
In Baiyun, China, awareness of the UV Index is crucial for everyone's health, especially as the region enjoys a Cfa climate characterized by warm summers and potentially high sun exposure. Understanding UV levels is essential not only for preventing sunburn but also for safeguarding skin health in the long run. Typically, Baiyun experiences varying UV intensity throughout the day, peaking sharply around midday with levels reaching as high as 12. This highlights the importance of taking protective measures during the hours of greatest risk, ensuring you can enjoy the sun safely while keeping your skin protected.
At sunrise, the UV Index starts modestly at 2 around 07:00, but as the sun climbs higher, it rapidly intensifies. By 10:00, it peaks at an impressive 9, with a maximum of 12 reached at noon. This high UV index indicates a critical time for sun protection, as the levels moderate slightly in the afternoon. At 13:00, it remains robust at 11, tapering down to 6 by 15:00, before declining further to 4 at 16:00. As evening approaches, the UV Index drops to a minimal 1 by 18:00, finally settling at 0 by 19:00. This data reflects the importance of sunscreen and protective measures, especially during the peak hours of 10:00 to 14:00 when exposure is most harmful.
| 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 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 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 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
As the seasons change, so do the UV Index levels, significantly affecting sun exposure risk. From January to February, the UV Index remains high (6-7), with a burn time of approximately 25 minutes. However, by March and April, this escalates to very high (10), where the burn time drops to just 15 minutes. The peak risk months are from May to August, where the UV Index reaches an extreme level of 11-12, necessitating protective measures for as little as 10 minutes of sun exposure. In September and October, the index remains very high (10-8) with a burn time of 15 minutes, before dropping to high (7) in November and moderate (5) in December, where burn times increase to 25-30 minutes. Visitors and residents should be particularly vigilant during the summer months, applying sunscreen, wearing protective clothing, and seeking shade to minimize the risk of sunburn and long-term skin damage.
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 |
| Baiyun | 6 | 7 | 10 | 10 | 11 | 12 | 12 | 12 | 10 | 8 | 7 | 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 |