Last updated: August 1, 2025
Understanding the UV Index is crucial for the residents of Hongwansi, China, where the climate is categorized as ET (Tundra), resulting in unique UV exposure patterns. Being aware of UV levels not only helps prevent painful sunburns but also plays a vital role in maintaining long-term skin health. With peak UV levels soaring as high as 13 in midday hours, it's essential to stay informed about the daily UV Index to protect yourself from harmful rays. Whether you're stepping outside for a quick errand or planning a day in the sun, knowing when to seek shade or apply sunscreen can make all the difference in your skin's well-being!
The UV Index (UVI) throughout the day presents a clear progression towards peak intensity, highlighting the importance of sun safety during midday hours. Starting from a modest maximum of 1 at 07:00, the UVI climbs steadily, reaching 4 by 09:00 and 6 at 10:00. As the sun approaches its zenith, the UVI spikes dramatically, peaking at an intense 13 during the 13:00-14:00 window, signaling a critical time for protection against harmful UV rays. This potent exposure subsides in the afternoon, dropping to 11 by 15:00 and gradually declining towards 5 at 17:00. The evening brings a welcome relief as the index falls to 3 by 18:00 and dwindles further to 1 at 19:00. Understanding these hourly fluctuations allows you to take proactive measures, ensuring your safety while enjoying the sun!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | 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 | 12 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV levels fluctuate significantly, with high-risk months peaking from March to August. During this period, the UV Index reaches its highest levels, particularly in April and May with readings of 11 and 14, classifying the exposure as extreme and allowing for only a 10-minute burn time. Residents and visitors are strongly advised to take precautions during these months, such as wearing protective clothing, applying sunscreen, and seeking shade when possible, especially between 10 a.m. and 4 p.m. Conversely, during January and December, the UV Index is at its lowest (3), indicating moderate risk, where burn time extends to 30 minutes. It’s essential to remain aware of seasonal UV changes to safeguard skin health year-round.
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 |
| Hongwansi | 3 | 6 | 10 | 11 | 14 | 14 | 13 | 12 | 10 | 8 | 6 | 3 |
| 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 |