Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Yanji, China, particularly given its Cwa climate, which often brings intense sunlight and varying UV exposure throughout the day. Awareness of UV levels is vital for preventing sunburn and promoting long-term skin health. During peak hours, notably between 10:00 AM and 1:00 PM, the UV Index can soar to levels of 10, indicating a high risk of harm from unprotected sun exposure. By staying informed about these daily UV fluctuations, you can take proactive steps to protect yourself and enjoy the beautiful outdoors safely.
As the sun rises, the UV Index begins its ascent, starting at a gentle 1 by 7:00 AM. By 8:00 AM, it climbs to a moderate 3, hinting at the increasing intensity of the sun. The peak of the day occurs between 10:00 AM and 12:00 PM, where the UV Index hits a maximum of 10, advising caution for those outdoors. As the afternoon progresses, it gradually tapers off, decreasing to 9 at 1:00 PM and 8 by 2:00 PM. The sun’s strength wanes further into the evening, dropping to 3 by 4:00 PM and settling back to 1 by 6:00 PM, marking a cool down as daylight fades. Overall, it’s a reminder of the importance of sun safety during the peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index shows distinct seasonal changes that are important for both visitors and residents to consider. From January to February, the UV Index ranges from 4 to 5, categorized as moderate, with a burn time of 30 minutes. As spring approaches in March, the index rises to 7 (high), reducing burn time to 25 minutes. The summer months of April through August see significantly higher levels, peaking at 11 in August (extreme category) with a burn time of just 10 minutes, marking these as high-risk months for sun exposure. As fall arrives in September and October, the index decreases to 8, still indicating very high risk. By late fall and winter, November and December return to a moderate risk with indices of 5 and 3 respectively, allowing for longer burn times of 30 minutes. Visitors and residents are advised to take necessary precautions during high UV months, especially from April to August, by seeking shade, wearing protective clothing, and applying sunscreen 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 |
| Yanji | 4 | 5 | 7 | 8 | 10 | 10 | 10 | 11 | 8 | 8 | 5 | 3 |
| 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 |