Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Henan, China, as it serves as a vital tool for protecting skin health and preventing sunburn. With the region's Dwb climate, the sun's intensity can soar, especially during peak hours when UV levels reach a high of 9 around noon. By being aware of these fluctuations, you can take proactive measures to safeguard yourself from harmful ultraviolet rays and maintain healthy skin all year round. Stay informed and enjoy the sun safely in Henan!
As the sun rises, the UV Index begins its daily ascent. At 07:00, it starts gently at 2, but by 08:00, it climbs to 4, signaling the need for a bit of sun protection. The intensity peaks between 10:00 and 12:00, reaching a striking 9 at 11:00, making midday the perfect time to seek shade. As the afternoon progresses, the index gradually declines; by 14:00, it drops to 6, and by 15:00, it dips further to 4. In the late afternoon and evening, the UV Index settles down, dropping to 1 by 17:00 and remaining low until sunset at 19:00. Remember, even on lower index days, it's wise to stay sun-smart during 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 | 9 | 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 |
The UV Index experiences notable seasonal changes throughout the year, highlighting varying risk levels for sun exposure. From January to February, the UV Index remains low (2), allowing for safe outdoor activities with a burn time of 45 minutes. As spring progresses, March sees a moderate increase to an Index of 4, indicating a 30-minute burn time. The high-risk months emerge in late spring and summer, peaking in June and July with a very high UV Index of 8 and 9, where the burn time dramatically shortens to just 15 minutes. Visitors and residents are strongly advised to take precautions during these months, such as wearing sunscreen, protective clothing, and seeking shade during peak hours. As summer transitions into autumn, September’s UV Index drops to 6, while October sees a further decrease to 4, both remaining moderate and allowing for safer outdoor activities with longer burn times of 25 to 30 minutes. By November and December, the UV Index returns to low levels (2 and 1), providing a safer environment for outdoor enjoyment with burn times extending back to 45 minutes.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Henan | 2 | 2 | 4 | 6 | 7 | 8 | 9 | 8 | 6 | 4 | 2 | 1 |
| 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 |