Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Changshanzi, China, where the climate can intensify UV exposure due to its semi-arid conditions. Monitoring UV levels plays a key role in preventing sunburn and protecting skin health, especially during peak hours when the index reaches a maximum of 10 around noon. With daily fluctuations, knowing when UV rays are most intense can help you make informed decisions about sun safety. As you navigate Changshanzi's sunny days, being aware of the UV Index not only enhances your outdoor experience but also significantly contributes to long-term skin protection.
The UV Index fluctuated throughout the day, peaking at an intense 10 at 12:00 PM, making it crucial for sun protection during midday hours. The morning began with a gentle start at 2 by 7:00 AM, climbing steadily to 9 by 11:00 AM. As the sun reached its zenith, the index soared, presenting a significant risk for those outdoors without protection. After the midday high, the UV levels gradually decreased, dropping back to 6 by 3:00 PM and further down to 1 by 6:00 PM. This data underscores the importance of planning outdoor activities to align with safer UV levels while enjoying the sunshine!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | 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 | 10 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal variation, affecting sun exposure risk. From January to February, UV levels are relatively low to moderate, with burn times extending to 45 minutes in January and reducing to 30 minutes in February. As spring approaches, especially in March and April, UV levels rise sharply to high, necessitating caution with burn times decreasing to 25 minutes. The summer months of May, June, and July present the highest risk, with UV Index values peaking at 10 and a minimal burn time of just 15 minutes. August sees a slight reduction, but remains very high at 8. As summer fades, the UV Index drops to 7 in September, and further to 5 and 3 in October and November, respectively, before returning to low levels in December. Therefore, it is essential for visitors and residents to be especially vigilant during the high-risk months of May through August, employing adequate sun protection measures like sunscreen, protective clothing, and seeking shade, especially during peak hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Changshanzi | 2 | 3 | 6 | 7 | 9 | 10 | 10 | 8 | 7 | 5 | 3 | 2 |
| 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 |