Last updated: July 2, 2025
In Shiyan, China, understanding the UV Index is crucial for safeguarding your skin, especially in a region characterized by its Dwb climate, which typically features hot summers and cold winters. With peak UV levels reaching a maximum of 10 during midday hours, awareness of these readings can significantly reduce the risk of sunburn and long-term skin damage. Keep an eye on the daily UV forecasts to enjoy the outdoors confidently while protecting your health from unnecessary exposure, particularly when the sun is at its most intense between 10 AM and 2 PM.
The hourly UV Index paints a clear picture of the day's intensity from morning to evening. Starting at a mild 3 at 7:00 AM, the day warms up quickly, peaking at a robust 10 between 11:00 AM and 12:00 PM—the perfect time to seek shelter or apply sunscreen. After that fleeting high, the UV Index gradually declines, dropping to 4 by 3:00 PM and further diminishing to 1 by 5:00 PM. As the sun sets, the UV levels plummet to a safe 0 by 7:00 PM. This data underscores the importance of protecting your skin during peak hours, especially when the sun is at its strongest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 3 | moderate | 30 min |
| 08:00 | 5 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index exhibits noticeable seasonal changes, indicating varying levels of sun exposure risk. January and December are characterized by a low UV Index (2), with safe burn times of 45 minutes. As spring approaches, the index rises to a moderate rating of 3 in February and 5 in March. The transition to summer brings significantly higher UV levels, peaking in July at a critical 10, categorizing it as very high, with a burn time of only 15 minutes. May and June also carry very high values (8 and 9, respectively). August begins a gradual decline, yet still remains at a very high level of 9. The fall months see a reduction to high (September) and moderate (October and November) exposure, with burn times increasing again to 25 and 30 minutes respectively. Visitors and residents should exercise heightened caution from April to August, with protective measures, such as sunscreen and appropriate clothing, being essential during these high-risk months for UV exposure.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Shiyan | 2 | 3 | 5 | 7 | 8 | 9 | 10 | 9 | 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 |