Last updated: June 2, 2025
Understanding the UV Index in Changtu, China, is crucial for safeguarding your skin and overall health. With typical midday values soaring as high as 12, awareness of UV levels can help prevent sunburn and long-term skin damage. Changtu’s Cfa climate features hot summers, making it essential to recognize the risks associated with elevated UV exposure, especially during peak hours from 10 AM to 2 PM. Stay informed and protect yourself from harmful rays to enjoy the vibrant outdoors safely!
The UV Index throughout the day offers a vivid glimpse into solar intensity, peaking dramatically as the sun reaches its zenith. Starting at 7:00 AM with a moderate 2, the index climbs steadily, reaching 4 by 8:00 AM. By 9:00 AM, it surges to 7, and from 10:00 AM to 12:00 PM, it hits its maximum, soaring to 12 at noon. As the day progresses, a gradual decline begins, with 11 at 1:00 PM and tapering down to 8 by 2:00 PM. The afternoon sees a gentle decrease, settling at 6 by 3:00 PM, and finally dwindling to a mere 1 by 5:00 PM. The sun's impact fades into the evening, where the UV Index drops to 0 by 7:00 PM, signaling a retreat from the day's solar embrace. This data highlights the importance of sun protection from late morning through early afternoon, when UV levels are at their highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 10 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index varies significantly, indicating changes in sun exposure risk. January and December see moderate UV levels (Index 5), with a burn time of 30 minutes, while February rises to a high risk (Index 7) with a shorter burn time of 25 minutes. The spring months of March and April reach very high levels (Index 9 and 10), reducing safe exposure time to just 15 minutes. The summer months, particularly May through August, present extreme UV conditions (Index 11-12) with a critical burn time of only 10 minutes, posing the highest risk for skin damage. As the year progresses into September and October, UV levels taper to very high (Index 10 and 8) again allowing for 15 minutes of exposure, before falling back to high in November. To ensure safety, visitors and residents should be especially cautious during the summer months and plan outdoor activities accordingly, using sunscreen, protective clothing, and seeking shade, particularly between 10 a.m. and 4 p.m. when UV radiation is most intense.
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 |
| Changtu | 5 | 7 | 9 | 10 | 11 | 12 | 12 | 12 | 10 | 8 | 6 | 5 |
| 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 |