Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Changtu, China, where the climate falls under the Dwa category, bringing warm summers and varying UV exposure throughout the day. Keeping an eye on UV levels is vital not only for preventing painful sunburns but also for protecting long-term skin health against harmful ultraviolet rays. During the peak hours, especially around noon when the UV Index can soar as high as 10, awareness of these levels becomes even more important. With such risks associated with high UV readings, being informed helps ensure you enjoy Changtu’s sunny days while safeguarding your skin.
As the sun rises, the UV Index begins its daily dance, peaking at 12:00 PM with an impressive score of 10, signaling the sun's intensity is at its highest. Early morning starts gently with a UVI of 2 at 7:00 AM, gradually climbing to 4 by 8:00 AM and reaching 6 by 9:00 AM. As the clock ticks towards mid-day, the intensity escalates sharply, culminating in an exhilarating 9 at 11:00 AM. However, after noon, the UVI begins its descent—dipping to 8 at 1:00 PM and continuing to slide down to 3 by 4:00 PM. As evening approaches, it settles back to a tranquil 1 by 6:00 PM, reminding us that while the sun steals the spotlight during the day, its rays gradually wane as the day draws to a close. Stay vigilant and protect your skin during those peak hours!
| 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 | 8 | very high | 15 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index fluctuates significantly, indicating varying levels of sun exposure risk that visitors and residents should be aware of. From January to March, the index remains low to moderate, allowing for safer outdoor activities; however, as we move into April with a UV Index of 7, precautions should be taken as the risk escalates to high. The months of May through August present the highest risk, with UV Index values peaking at 10 in June and July, classifying these months as extremely hazardous for sun exposure, with a reduced burn time of just 15 minutes. By September, the index drops to 7, indicating high risk again, before returning to moderate levels in the fall and winter months of October to December. Therefore, during May to August, it is crucial for individuals to protect themselves from UV radiation by seeking shade, wearing protective clothing, and applying sunscreen frequently to minimize the risk of sunburn and long-term skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Changtu | 2 | 3 | 5 | 7 | 8 | 10 | 10 | 9 | 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 |