Last updated: July 2, 2025
Understanding the UV Index in Sunwu, China is crucial for promoting skin health and preventing sunburn. As the UV levels peak during the midday hours, it’s essential to be aware of these fluctuations, particularly in Sunwu’s Dwb climate, which features warm summers and cold winters. With maximum UV Index values reaching 8 from 11:00 AM to 12:00 PM, the potential for skin damage significantly increases. By staying informed about UV levels, residents can take proactive measures to protect themselves from harmful sun exposure, ensuring a safer and healthier outdoor experience.
As the sun rises, the UV Index begins to climb, peaking at a maximum of 8 between 11:00 AM and 12:00 PM. This midday period is crucial for sun safety, with the index suggesting a high risk of harm from unprotected sun exposure. Starting from a mild 3 at 7:00 AM, the index escalates to a moderate 6 at 9:00 AM, and then swiftly reaches 7 by 10:00 AM. After hitting its zenith, the UV levels gradually decline to 6 by 2:00 PM and then continue to drop, falling to 1 by 5:00 PM and remaining low into the evening. Remember, during the peak hours, it’s essential to seek shade, wear protective clothing, and apply sunscreen to minimize the risks associated with UV radiation. The day's progression underscores the significance of UV awareness to ensure both safety and enjoyment in the sun.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 3 | moderate | 30 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 7 | high | 25 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 |
Throughout the year, the UV Index exhibits significant seasonal changes that affect sun exposure risks. From January to February, the UV Index remains low (1-2), allowing for a safer outdoor experience with a burn time of up to 45 minutes. As spring approaches in March and April, the UV levels rise to moderate (4-5), shortening the safe exposure to 30 minutes. The onset of summer, particularly May through August, marks the period of highest risk, with UV Index values reaching 8 and a burn time plummeting to just 15 minutes—this is the time for extreme caution. Moving into fall, the Index decreases to moderate levels again in September and October, allowing for safer outdoor activities with a 30-minute burn time, before returning to lower levels by November and December (UV Index 1-2). Visitors and residents are strongly advised to take protective measures—such as sunscreen and protective clothing—especially during the high-risk months of May to August to minimize the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunwu | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 8 | 5 | 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 |