Last updated: June 2, 2025
Understanding the UV Index in Siheyuan, China is crucial for promoting skin health and preventing sunburn. With UV radiation levels peaking between 10 AM and 2 PM, residents and visitors must be aware of how to protect themselves during these high-risk hours. Siheyuan experiences a semi-arid climate, characterized by hot summers and cold winters, which makes UV exposure particularly intense during the warmer months. By staying informed about current UV levels, individuals can take proactive steps to shield their skin from harmful rays and enjoy the beautiful outdoors safely.
As the day unfolds, the UV Index climbs steadily, peaking at a stunning 12 around noon. Starting from a modest 1 at 7:00 AM, the intensity escalates, reaching a vital 10 by 11:00 AM. The afternoon continues with high values, with 12 sustained from 12:00 PM to 1:00 PM, before gradually tapering off. By 4:00 PM, the index drops to 6, and as evening approaches, it cools to a safe 1 by 7:00 PM. For those venturing outdoors, it’s crucial to take precautions during the peak hours from 10:00 AM to 2:00 PM, when the sun's rays are strongest.
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 1 | low | 45 min |
08:00 | 2 | low | 45 min |
09:00 | 5 | moderate | 30 min |
10:00 | 8 | very high | 15 min |
11:00 | 10 | very high | 15 min |
12:00 | 12 | extreme | 10 min |
13:00 | 12 | extreme | 10 min |
14:00 | 11 | extreme | 10 min |
15:00 | 9 | very high | 15 min |
16:00 | 6 | high | 25 min |
17:00 | 3 | moderate | 30 min |
18:00 | 2 | low | 45 min |
19:00 | 1 | low | 45 min |
Throughout the year, UV radiation levels fluctuate significantly, with high-risk months occurring from March to September. The UV Index reaches its peak during May and June, with an extreme rating of 11-12, indicating a very short burn time of just 10 minutes. As the season progresses, April’s UV Index rises to 10 (very high), while March starts at 7 (high), urging residents and visitors to be particularly cautious. In contrast, the fall and winter months, particularly from November to February, feature lower UV levels ranging from 3 to 5 (moderate), allowing for longer safe exposure times of 30 minutes. To protect against skin damage, it's advisable for everyone to monitor the daily UV Index, seek shade during peak hours, wear protective clothing, and apply sunscreen with appropriate SPF, especially during the high-risk months.
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 |
Siheyuan | 4 | 5 | 7 | 10 | 11 | 12 | 12 | 11 | 9 | 7 | 4 | 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 |