Last updated: June 2, 2025
Understanding the UV Index is crucial for residents of Zishui, China, as it directly impacts skin health and sunburn prevention. In this region, characterized by a Cfa climate with warm summers, UV exposure can vary significantly throughout the day. With peak UV Index values reaching 10 around midday, it’s essential to be aware of your sun exposure to protect against harmful effects. By keeping an eye on UV levels, you can enjoy the beautiful outdoor environment of Zishui while safeguarding your skin and overall health.
As the sun rises, the UV Index gradually transitions from a mild 1 at 07:00 to an invigorating 3 by 08:00. The peak UV intensity hits its stride between 12:00 and 13:00, reaching a striking 10, a clear call for sun protection. As the afternoon progresses, the index begins to decline, tapering off to 8 at 14:00, 6 at 15:00, and eventually settling to a gentle 2 by 17:00. By evening, the UV levels dip back down, returning to a safe 1, indicating it's time to relax and enjoy the cooler, softer light of sunset.
| 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 | 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 | 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 |
As the seasons change, so do the UV Index values, significantly impacting sun safety for both visitors and residents. January and February start with a moderate UV Index of 5, allowing for about 30 minutes of safe sun exposure. However, as spring approaches, March through May sees a dramatic increase, with the UV Index reaching 8 and escalating to 10, corresponding to a very high category and necessitating limited exposure to just 15 minutes. The summer months of July and August present the most direct sunlight with extreme UV Index levels of 11, where even 10 minutes can lead to burns. As fall arrives, September maintains a high UV Index of 10, while October sees a slight decrease to 8, both remaining in the very high exposure category. Finally, the year concludes with lower UV levels, returning to moderate values in November (5) and December (4), where time spent in the sun can safely increase back to 30 minutes. To ensure safety, all individuals are advised to monitor the UV Index closely, especially from March through October, and to seek shade, wear protective clothing, and apply sunscreen during high-risk months.
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 |
| Zishui | 5 | 5 | 8 | 9 | 10 | 10 | 11 | 11 | 10 | 8 | 5 | 4 |
| 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 |