Last updated: July 2, 2025
In Sanlong, China, understanding the UV Index is crucial for safeguarding your skin against harmful rays. With peak UV levels often hitting 11 during midday, awareness of these fluctuations can help prevent sunburn and long-term skin damage. Sanlong’s humid subtropical climate (Cfa) brings warm summers and ample sunlight, which, while pleasant, can lead to increased UV exposure risks. By monitoring the daily UV Index, residents and visitors can take the necessary precautions to enjoy the outdoors while keeping their skin healthy and protected.
The UV Index data paints a vivid picture of the sun's intensity throughout the day. Beginning at 07:00, the index starts at a modest 2, gradually climbing to 4 by 08:00. As the sun rises higher, it peaks impressively at 11 between 11:00 and 13:00, reflecting the strongest ultra-violet rays of the day. From this zenith, the index begins to descend, dipping to 9 at 14:00, then tumbling down to 6 by 15:00 and continuing to decline, reaching 3 by 16:00. The evening hours show a gentle drop, concluding with a 1 at 18:00 and finally falling to 0 at 19:00, marking the day's end. To enjoy the outdoors safely, it's best to limit sun exposure during the peak hours of 11:00-13:00 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 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
As the seasons change, so do the UV Index levels, highlighting the importance of sun safety throughout the year. The high-risk months for UV exposure are March to August, where the index peaks at 11 during July and August, categorizing it as extreme. During these months, it is crucial to minimize direct sun exposure, limiting time outdoors to 10-15 minutes without protection. Conversely, from January to February and November to December, the UV levels are lower, with index values generally between 3 and 6, making sun exposure more manageable. Nevertheless, even in the cooler months, moderate UV levels can still cause skin damage, so wearing sunscreen is advisable. For both residents and visitors, protective measures such as wearing sunscreen, hats, and sunglasses are essential, especially from late spring to mid-summer when UV risks are at their highest.
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 |
| Sanlong | 4 | 6 | 8 | 9 | 10 | 10 | 11 | 11 | 10 | 7 | 5 | 3 |
| 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 |