Last updated: June 2, 2025
Understanding the UV Index in Chengxi, China is essential for everyone who enjoys the outdoors, as it offers critical insights into ultraviolet radiation levels. With the potential for sunburn and long-term skin damage, knowing the UV levels can significantly enhance your sun safety and skin health. Chengxi's Cfa climate brings a unique blend of warmth and humidity, often resulting in elevated UV exposure, particularly during peak hours when the UV Index can reach a high of 11. By becoming aware of these UV fluctuations throughout the day, residents and visitors can take proactive measures to protect themselves and enjoy the sun responsibly.
From 07:00 to 19:00, the UV Index experiences a dynamic climb, peaking sharply at 12:00 with a high of 11. Early morning hours start low, with a manageable 2 at 07:00, but as the sun ascends, the intensity increases. By 10:00, the index reaches 8, highlighting a need for sun protection. The critical hour arrives at 11:00, where the index hits 10, indicating very high risk of harm from unprotected sun exposure. After the midday peak, a gradual decline begins, with values dropping to 5 by 15:00, and continuing down to 0 by evening at 19:00. This pattern emphasizes the importance of sun safety measures, especially 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 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index experiences significant seasonal fluctuations. From January to February, there is a gradual increase in UV radiation, moving from a moderate index of 4 to a high index of 6. As spring approaches, the UV levels spike dramatically, peaking at an extreme UV index of 11 in July and August, where the burn time falls to as little as 10 minutes. The high-risk months for UV exposure are from March to September, particularly the peak summer months when UV levels are at their highest. Visitors and residents are advised to take precautions during these months by wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade during peak hours to minimize the risk of skin damage. As autumn and winter roll in, the UV Index gradually decreases, making it safer for outdoor activities with less intensive sun protection needed.
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 |
| Chengxi | 4 | 6 | 8 | 10 | 10 | 10 | 11 | 11 | 10 | 8 | 5 | 4 |
| 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 |