Last updated: June 2, 2025
Understanding the UV Index is crucial for residents of Heicheng, China, where the Dwb climate brings distinct seasonal changes and varying levels of sun exposure. As UV levels can soar to a maximum of 12 during midday, being aware of these fluctuations is essential for effective sunburn prevention and maintaining skin health. With the potential for harmful effects from UV radiation, particularly between 10:00 AM and 2:00 PM, recognizing when to seek shade or apply sunscreen can make a significant difference. Stay informed and protect your skin from the sun’s powerful rays to enjoy the vibrant outdoors safely!
As the sun rises, the UV Index begins its ascent, starting at a mild 1 at 07:00 and gradually climbing throughout the morning. By 09:00, it reaches a moderate 5, signaling the need for some sun protection. The intensity peaks around 12:00, with a high of 12, which indicates very high levels of UV radiation. Hereafter, the index gently declines, tapering off to 9 by 15:00, before easing down to 4 by 17:00. As the evening unfolds, the UV risk diminishes, dropping to 2 by 18:00 and finally returning to 1 at 19:00. This hourly UVI data underscores the importance of being mindful of sun exposure, especially during the midday hours when UV levels are at their highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal changes, highlighting months of increased sun exposure risk. From January to February, the UV Index rises from a moderate level of 4 to a high level of 6, indicating a shift in sun intensity and a decrease in burn time to 25 minutes. As spring unfolds, March and April see a jump to 8 and 10 (both in the very high category) with burn times of only 15 minutes. The peak months for UV exposure are May through August, where the index remains at an extreme level of 12, and the safe exposure time drops to just 10 minutes. September and October signal a slight reduction, yet still maintain very high indices of 10 and 8, respectively. Conversely, November and December revert to a moderate exposure risk of 5 and 3, allowing for longer burn times of 30 minutes. Given this data, it's crucial for visitors and residents alike to minimize sun exposure during the high-risk months of May through August, and to take protective measures like wearing sunscreen and long clothing during the peak sunlight hours to reduce 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 |
| Heicheng | 4 | 6 | 8 | 10 | 12 | 12 | 12 | 12 | 10 | 8 | 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 |