Last updated: July 2, 2025
In Yihantong, China, being aware of the UV Index is crucial for safeguarding your skin against harmful rays. With UV levels reaching a maximum of 10 around noon, understanding these fluctuations can help you take proactive measures to prevent sunburn and maintain long-term skin health. Yihantong's Dwb climate, characterized by its distinctive seasonal changes, can lead to varying UV exposure risks throughout the year, making it essential to stay informed. Whether you're planning outdoor activities or simply enjoying a sunny day, knowing the UV Index empowers you to protect yourself from potential damage and enjoy the outdoors safely.
The UV Index readings throughout the day reveal a dynamic shift in sun exposure, peaking at 10 between 11:00 AM and 12:00 PM. This intense level of UV radiation during the midday hours signals the need for protective measures, such as sunscreen and shade. As the clock ticks past noon, the index begins to gradually decline, dropping to 8 by 1:00 PM, and continuing its descent to 6 by 2:00 PM. By the afternoon, it further diminishes to 4 at 3:00 PM and dips to a mere 1 by 5:00 PM, where it remains steady into the evening. Awareness of these fluctuations helps in planning outdoor activities safely under the sun.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 3 | moderate | 30 min |
| 08:00 | 5 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index demonstrates significant seasonal variation, indicating changing risks for sun exposure. January to February shows lower levels of UV radiation, with an index of 2 and 3, categorized as low to moderate risk, where burn times are relatively long at 45 minutes and 30 minutes, respectively. As spring approaches, March and April experience an upward trend, transitioning to a moderate to high risk (UV Index 5 and 6) and shortening burn times to 30 minutes and 25 minutes. The risk peaks sharply in the summer months of May to July, where the index reaches levels of 8 to 10, categorized as very high, and burn times drop dramatically to just 15 minutes. The risk begins to decline in August and September, with an index of 8 and 6 respectively, but remains significant. The UV Index further decreases in October and settles into lower categories during the winter months (November and December), featuring indices of 2 and 1 and longer burn times of 45 minutes. Residents and visitors should exercise caution and prioritize sunscreen application, protective clothing, and limits on sun exposure during the high-risk months of May through September to ensure health and safety under increased UV radiation.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yihantong | 2 | 3 | 5 | 6 | 8 | 9 | 10 | 8 | 6 | 4 | 2 | 1 |
| 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 |