Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Yi'an, China, where the Dwa climate brings varied sun exposure throughout the year. With maximum UV levels peaking at 7 during midday, awareness of these figures is essential for sunburn prevention and ensuring long-term skin health. By recognizing when the sun's rays are at their strongest, you can take proactive measures to protect your skin from potential damage and enjoy your time outdoors. Being informed about the UV Index not only enhances your outdoor experience but also plays a vital role in maintaining your well-being amidst the diverse weather conditions Yi'an has to offer.
The UV Index for the day reveals a peak intensity between 10:00 AM and 12:00 PM, where it consistently reaches a maximum of 7. Starting from a gentle 2 at 7:00 AM, it quickly climbs to a moderate 5 by 9:00 AM. As the sun ascends, the index hits its high point of 7 at both 10:00 AM and 11:00 AM, signaling a strong need for sun protection during these hours. The intensity begins to taper off after noon, dropping to 6 by 1:00 PM, and steadily declines to 1 by 5:00 PM. As the evening approaches, the UV Index dips to its lowest at 1 from 5:00 PM onward, making for a safer time to enjoy outdoor activities. Plan accordingly to stay protected during the sun's most potent moments!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 5 | moderate | 30 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 2 | low | 45 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 experiences noticeable fluctuations, indicating varying levels of sun exposure risk. January and February are classified as low risk with a consistent UV Index of 2 and a burn time of 45 minutes. As spring approaches, March sees a moderate increase to a UV Index of 4 (30 minutes burn time), which escalates into the high-risk category with values reaching 6 in April and 7 in May. The summer months (June, July, and August) peak at a very high UV Index of 8, significantly reducing safe exposure times to just 15 minutes. After the summer heat, September returns to a high risk, followed by moderate conditions in October. As the year winds down, November and December revert to low exposure categories, with UV Index values of 2 and 1, respectively. Visitors and residents should exercise heightened caution during the high-risk months of April to August, using sunscreen, wearing protective clothing, and seeking shade, especially during midday hours when UV radiation is strongest.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yi'an | 2 | 2 | 4 | 6 | 7 | 8 | 8 | 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 |