Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Si'erbao, China, where sunlight can be both a blessing and a risk. With the region's Dwa climate, characterized by varying temperatures, awareness of UV levels helps protect against sunburn and promotes long-term skin health. During peak hours, especially between 11:00 AM and 1:00 PM, the UV Index can soar to 9, indicating a significantly high risk of harm from unprotected sun exposure. Staying informed about local UV levels not only ensures healthier skin but also enables outdoor enthusiasts to enjoy Si'erbao's beautiful landscapes safely.
The UV Index throughout the day demonstrates a clear peak and gradual decline. Starting at 07:00, the index begins modestly at 2, but as the sun rises, it reaches 4 by 08:00. The intensity escalates quickly, hitting 6 at 09:00 and soaring to 8 by 10:00. The sun’s strength reaches its zenith at 11:00 and 12:00, each clocking in at a maximum of 9—a reminder to take necessary precautions! As the afternoon progresses, values dip to 8 at 13:00 and 7 at 14:00, before dropping to 5 by 15:00. The decline continues into the evening, with indices falling to 3 at 16:00, and then to 2 at 17:00, while fading to 1 by 18:00 and 19:00. This data highlights the importance of midday sun protection when the UV levels are at their highest!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index levels change significantly, indicating varying levels of sun exposure risk. The high-risk months are from April to July, where the UV Index reaches its peak at 11 in July, classified as extreme, with a burn time of just 10 minutes. In April and May, the UV Index is 8, tagged as very high, allowing for only 15 minutes of exposure before burning begins. Conversely, during January and December, the UV Index remains low at 2, offering a safe burn time of 45 minutes. As such, it's crucial for visitors and residents to take extra precautions during high UV periods, such as seeking shade, wearing protective clothing, and using sunscreen to minimize skin damage. Stay vigilant from March through September to ensure safe sun exposure practices.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Si'erbao | 2 | 4 | 6 | 8 | 8 | 9 | 11 | 10 | 7 | 6 | 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 |