Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Tianchi, China, where the combination of its Cwa climate and varying altitudes can lead to significant UV exposure risks. Recognizing UV levels can help you take essential steps in preventing sunburn and protecting your skin health, especially during the peak hours around noon when the index soars to a maximum of 12. With measurements from 1 in the early morning to 9 at midday, being aware of these fluctuations allows you to enjoy the stunning outdoor beauty of Tianchi while safeguarding yourself against harmful UV rays. Stay informed, stay protected!
From 7:00 AM to 8:00 AM, the UV Index gradually rises from 1 to 2, indicating a low risk of harm from unprotected sun exposure. As the sun climbs higher, the index hits 3 at 9:00 AM, suggesting a moderate level of UV radiation. The real intensity kicks in around 10:00 AM when it surges to 6, transitioning to a high-risk period at 11:00 AM with a peak of 9. By 12:00 PM, the UV Index reaches an impressive 11, staying at 12 from 1:00 PM to 2:00 PM, highlighting a critical need for sun protection. As afternoon approaches, the index begins to taper off, dropping to 8 at 3:00 PM, followed by a gradual decline to 3 by 5:00 PM, and finally returning to 2 and 1 as the sun sets. This data serves as a vital reminder to stay vigilant about sun safety, especially during the midday hours when UV radiation is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index levels fluctuate significantly, reaching their peak during the summer months of May through July, which are classified as extreme exposure with a UV Index of 11-12 and a burn time of just 10 minutes. The high-risk months for sun exposure include March through August, particularly in May and July when protective measures are crucial to prevent skin damage. In contrast, the winter months (January and December) present a moderate risk, with a UV Index of 4 and a longer burn time of 30 minutes. To ensure safety, both visitors and residents are advised to be vigilant during high UV Index months: seek shade, wear protective clothing, and apply sunscreen generously and regularly.
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 |
| 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 |
| Tianchi | 4 | 6 | 8 | 10 | 11 | 11 | 12 | 10 | 10 | 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 |