Last updated: July 2, 2025
Understanding the UV Index in Changtan, China is vital for everyone who enjoys the outdoors, as it serves as a key indicator of the sun's harmful ultraviolet radiation levels. High UV exposure can lead to sunburn and long-term skin damage, making it essential to stay informed about daily UV levels. Changtan, characterized by its Cfa climate, experiences significant UV risks, especially during peak hours when the index can soar to 12. Being aware of these fluctuations not only helps in preventing immediate harm but also supports long-term skin health and overall well-being. Stay vigilant and keep your skin protected in the vibrant sunshine of Changtan!
The UV Index data presents a clear peak in sun intensity during the midday hours. Starting from a low of 1 at 07:00, the values gradually increase, reaching a significant rise at 10:00 with a sharp climb to 8. The pinnacle occurs at 12:00, where the UV Index soars to a maximum of 12, indicating a high risk of harm from unprotected sun exposure. As the afternoon progresses, the index begins to decline, dropping to 10 by 14:00 and then gently tapering off to 4 by 16:00. By evening, the UV Index settles back down to 1 after 18:00, emphasizing the importance of sun safety during those peak hours between 11:00 and 14:00. Stay protected and enjoy the sun safely!
| 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 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | 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 |
Throughout the year, the UV Index varies significantly, indicating fluctuating levels of ultraviolet radiation that can impact skin health. From January to February, the UV Index remains at a moderate level of 5, allowing for a burn time of 30 minutes. As spring approaches, in March and April, the index rises to 8 and 9, categorizing these months as very high risk with a reduced burn time of 15 minutes. The summer months of May to August see the peak of UV intensity, with indices reaching 11 to 12, marking an extreme exposure category and necessitating action in as little as 10 minutes. In September and October, the risk level slightly decreases to the very high category, while November sees a drop to high risk with a burn time of 25 minutes. Finally, December returns to a moderate level of 4, allowing for 30 minutes of exposure. Visitors and residents should take extra precautions during the high-risk months of May through September, including wearing protective clothing, applying sunscreen, and seeking shade during peak sunlight hours.
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 |
| Changtan | 5 | 5 | 8 | 9 | 11 | 11 | 12 | 11 | 10 | 8 | 6 | 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 |