Last updated: August 1, 2025
Understanding the UV Index is crucial for residents and visitors of Chengjiao Zhen, China, where the climate is defined by its cold winters and hot summers. With peak UV levels soaring to 14 during midday hours, awareness of these values is essential for preventing sunburn and safeguarding skin health. By knowing how to interpret UV readings, individuals can take proactive measures against potential skin damage, especially during the sunniest hours when exposure risks are highest. Stay informed and enjoy the sunny days while keeping your skin protected!
The UV Index throughout the day exhibits a dramatic rise and fall, peaking at a scorching 14 at 1 PM. Early hours start off with a gentle UV Index of 1 at 7 AM, gradually increasing to 2 by 8 AM. As the sun climbs higher, the intensity surges, reaching 4 at 9 AM, followed by a notable jump to 7 at 10 AM and an intense 11 at 11 AM. The maximum UV exposure occurs at 12 PM, registering 13, before slightly tapering off to 14 just an hour later. The afternoon sees a decline, with readings falling to 11 at 3 PM and then down to 7 by 4 PM. As day turns to evening, the UV Index gently retreats, returning to 1 by 7 PM. It's a day that highlights the importance of sun safety, particularly during those midday hours!
| 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 | 7 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index exhibits significant seasonal variation, peaking during the summer months. From January to March, the index increases from a moderate 5 to a very high 10, indicating the need for increased sun protection as spring approaches. The months of April to August present the highest risk, with an extreme UV Index of up to 14, where burn times decrease to just 10 minutes. As summer wanes into September and October, the index slightly declines but remains in the very high category, signaling continued caution. November and December mark a return to moderate and high exposure levels, with burn times returning to 25-30 minutes. Visitors and residents are advised to proactively use sunscreen, wear protective clothing, and seek shade, especially during the high-risk months of April through September, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| Chengjiao Zhen | 5 | 7 | 10 | 13 | 14 | 14 | 14 | 13 | 12 | 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 |