Last updated: August 1, 2025
Understanding the UV Index is essential for residents and visitors in Tianchang, China, as it plays a critical role in safeguarding skin health and preventing sunburn. With the region's Dwa climate, characterized by distinct seasons and varying UV exposure throughout the year, it's crucial to stay informed about daily UV levels. Typically peaking around midday at levels as high as 10, awareness of these fluctuations can help you take proactive steps to protect your skin during outdoor activities, ensuring you enjoy the sun safely while minimizing the risk of long-term damage.
The UV Index peaks during the midday sun, reaching a maximum of 10 at noon, indicating a high risk of harm from unprotected sun exposure. As the day progresses, the index rises steadily from a mild 1 at 07:00 to an intensity of 9 by 11:00, prompting outdoor enthusiasts to stay protected. From 12:00 to 13:00, the UV Index remains at its highest, encouraging the use of sunscreen, hats, and protective clothing. Following this peak, it begins to dip gradually, falling to 4 by 16:00 and continuing to decrease to 1 by 19:00, when the day winds down and the sun begins to set. It's crucial to be mindful of these fluctuations and take necessary precautions during the peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | 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 too does the UV Index, which reflects the intensity of ultraviolet radiation and the potential for skin damage. During the winter months of January (UV Index 3) and February (UV Index 4), the exposure level is moderate, with a burn time of 30 minutes. However, as spring approaches, particularly in March (UV Index 6), the risk escalates to high, requiring more vigilant sun protection. The summer months are particularly hazardous, peaking from April (UV Index 8) through August (UV Index 10), denoting very high exposure levels where burn times shrink to just 15 minutes. Even as autumn settles in, September maintains a strong risk with a UV Index of 8, and October (UV Index 7) still poses a high risk. In contrast, November and December present much lower risks with indices dropping to 4 and 2 respectively. Visitors and residents are advised to prioritize sun safety, particularly during the high-risk months of April through September, by using sunscreen, wearing protective clothing, and seeking shade whenever possible.
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 |
| Tianchang | 3 | 4 | 6 | 8 | 10 | 10 | 10 | 10 | 8 | 7 | 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 |