Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Sanmenxia, China, where the climate regularly experiences intense sunlight. With ultraviolet radiation levels soaring, particularly between 10 AM and 2 PM, awareness of UV levels becomes essential for sunburn prevention and overall skin health. Sanmenxia, characterized by its humid subtropical climate, poses a significant risk during the summer months when UV exposure can reach extreme levels, underscoring the importance of checking the UV Index before heading outdoors. Stay informed to protect your skin and enjoy the sunny days safely!
As the sun rises, the UV Index begins its ascent, starting at a gentle 1 by 07:00. By 08:00, it climbs to 3, signaling a gradual increase in sun exposure. The index hits 5 by 09:00, marking the start of a more noticeable intensity. The real peak arrives at 12:00 when the UV Index skyrockets to a high of 11, urging caution for those outdoors. A slight decline follows, with the index at 10 by 13:00 and dropping to 9 from 14:00 to 11:00. As the afternoon fades, so does the UV intensity, retreating to 7 at 15:00 and tapering off to 5 by 16:00. The evening brings respite with values returning to 2 at 17:00 and settling back to 1 by the time the sun sets at 18:00 and continues until 19:00. This hourly journey marks a typical day where sun safety is paramount during peak hours. 🌞
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, so do ultraviolet (UV) radiation levels, significantly impacting both visitors and residents. January and February experience moderate UV levels (Index 4-5), with a burn time of 30 minutes; caution is still warranted. The UV Index intensifies in March (7), causing a shift to high risk, with a burn time of just 25 minutes. From April to July, UV levels reach extreme heights of 9-11, drastically reducing safe sun exposure to as little as 10 minutes. As we transition into August, September, and October, UV levels remain very high (9-10), with burn times of about 15 minutes. Those months herald high risk, especially for outdoor activities without sun protection. By November and December, UV levels lower back to moderate (3-4), allowing for safer sun exposure again for up to 30 minutes. Advice for everyone: during peak summer months, seek shade, wear protective clothing, and apply sunscreen regularly to minimize the risk of skin damage.
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 |
| Sanmenxia | 4 | 5 | 7 | 9 | 11 | 11 | 11 | 10 | 9 | 8 | 4 | 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 |