Last updated: August 1, 2025
Understanding the UV Index is crucial for residents and visitors of Longmen, China, where the climate can elevate UV exposure risks, particularly during the peak summer months. By being aware of UV levels, you can take proactive steps to protect your skin and prevent sunburn, ensuring long-term skin health. With maximum UV Index readings reaching as high as 12 around midday, it's essential to plan outdoor activities accordingly and adopt sun safety measures. In Longmen's distinct Cwa climate, sunlight can be intense, making UV Index awareness not just helpful, but vital for enjoying your time outdoors safely.
The UV Index throughout the day presents a vivid picture of sun intensity. In the early morning, starting at 07:00, the index is a gentle 1, gradually rising to 2 by 08:00. The real surge begins at 09:00, where it climbs to 4, reaching a peak of 12 around 13:00. Noteworthy are the hours between 11:00 and 14:00, when the index soars, hitting a maximum of 11 at 12:00 before slightly easing to 11 again by 14:00. As afternoon turns to evening, the UV levels decrease significantly, dropping to 8 by 15:00, and falling further to 1 by 19:00. This data emphasizes the importance of sun protection during midday hours when the UV radiation is at its strongest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | 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 | 10 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index values exhibit significant seasonal variations, indicating the need for increased awareness among residents and visitors. The high-risk months are from March to September, where the UV Index reaches very high to extreme levels—specifically peaking at 12 in both July and August. During these months, burn times drop to just 10 minutes, highlighting the urgency for effective sun protection measures. As a guideline, individuals should use sunscreen with high SPF, wear protective clothing, and seek shade during peak sun hours. Conversely, the month of January starts with a moderate UV Index of 5 (burn time: 30 min), making it safer for outdoor activities, while December sees a drop to 4 with similar burn time, signaling a lower risk for sun exposure. Nevertheless, all months warrant vigilance, particularly during the warmer seasons when the sun’s intensity is at its 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 |
| 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 |
| Longmen | 5 | 6 | 8 | 10 | 11 | 11 | 12 | 12 | 11 | 9 | 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 |