Last updated: June 2, 2025
In Sanyuan Chengguanzhen, understanding the UV Index is crucial for safeguarding skin health and preventing sunburn. As the sun rises, so does the risk of overexposure; during peak hours, the UV Index can reach as high as 10, indicating an increased potential for harm. With a Cwa climate, characterized by hot summers and distinct seasons, residents and visitors alike must stay informed about daily UV levels to protect themselves effectively. By being aware of these UV fluctuations, you can enjoy the beautiful outdoor spaces while minimizing the risks associated with excessive sun exposure.
The UV Index reveals an intriguing daily journey, starting from a mild 1 at 7:00 AM and gradually climbing to a peak of 10 between 12:00 PM and 1:00 PM. As the sun reaches its zenith, precautions are essential to shield against the intense rays. The index then gently descends, dropping to 9 at 2:00 PM, followed by a gradual decline to 3 by 5:00 PM. As evening approaches, the UV Index falls to a safe 1 by 7:00 PM, marking a notable end to the day. This pattern underscores the importance of sun safety strategies during midday hours when the ultraviolet intensity is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 9 | 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 |
Seasonal UV changes indicate a significant rise in ultraviolet exposure as the year progresses. From March to September, the UV Index reaches its peak, categorizing these months as high-risk for sunburn, especially from April through August, when the UV Index consistently remains at 10 (very high). During these high-risk months, burn times decrease to just 15 minutes, emphasizing the need for protective measures. Residents and visitors are advised to take precautions such as wearing sunscreen, protective clothing, and sunglasses, especially during peak sun hours. As we move into October and November, the UV Index falls, allowing for more moderate sun exposure with burn times of 25 and 30 minutes, respectively. Nonetheless, vigilance remains necessary throughout the year to mitigate UV-related health risks.
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 |
| Sanyuan Chengguanzhen | 3 | 5 | 7 | 9 | 10 | 10 | 10 | 10 | 9 | 7 | 5 | 3 |
| 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 |