Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Honglu, China, a region characterized by a humid subtropical climate (Cfa) that often leads to heightened sun exposure. Awareness of UV levels can help prevent sunburn and protect skin health, particularly during the peak hours when the UV Index soars—reaching a maximum of 11 around midday. With typical exposure risks peaking between 10 AM and 2 PM, being informed allows individuals to take necessary precautions, ensuring a safe and enjoyable outdoor experience while minimizing the harmful effects of ultraviolet radiation.
The UV Index throughout the day showcases a dynamic range of sun exposure, peaking dramatically at 12:00 PM with a maximum index of 10. Early morning hours start gently, with a mere 1 at 07:00 AM gradually rising to a moderate 4 by 09:00 AM. As the sun climbs higher, the index escalates to 9 by 11:00 AM and hits its zenith of 11 at 1:00 PM, indicating a critical level of UV radiation. Following the peak, there’s a noticeable decline; by 15:00 PM, the index dips to 7, continuing to taper off to 3 by 5:00 PM, before settling back to 1 as the evening sets in. Be sure to protect your skin during those peak hours to enjoy the sunshine safely!
| 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 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As seasonal changes progress, the UV Index demonstrates a significant increase from January through August, peaking at 12 in August with an extreme exposure category, indicating a burn time of just 10 minutes. High-risk months for UV exposure include March through August, where the UV Index consistently reaches very high to extreme levels. It is essential for both visitors and residents to take protective measures during this time, such as wearing broad-spectrum sunscreen, protective clothing, and seeking shade, especially between 10 AM and 4 PM. As the year transitions to fall and winter, the UV Index decreases to moderate levels in January and December, allowing for safer outdoor activities with longer burn times of 30 minutes.
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 |
| Honglu | 5 | 7 | 8 | 10 | 11 | 11 | 11 | 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 |