Last updated: June 2, 2025
Understanding the UV Index is crucial for residents of Erhaodi, China, where sun exposure can pose significant risks to skin health. With a temperate climate categorized as Dwb, Erhaodi experiences distinct UV levels throughout the day, peaking at a stratospheric 11 around noon. This makes awareness of UV levels paramount for preventing sunburn and promoting overall skin wellness. By evaluating the daily fluctuations of the UV Index—ranging from relatively safe levels in the morning to higher risks in the afternoon—locals can better protect themselves and enjoy the sunny days without compromising their skin health.
The UV Index fluctuates throughout the day, peaking dramatically in the late morning to early afternoon. Starting at a mild 2 at 07:00, it steadily climbs, reaching 3 by 08:00. By 09:00, the intensity ramps up to 5, but the real surge occurs as the clock approaches midday, with the UV Index soaring to a striking 10 at 11:00 and hitting a maximum of 11 from 12:00 to 13:00. After this intense peak, the index begins to decline, descending to 9 at 14:00, and gradually dropping to 5 by 16:00. As daylight fades, the numbers further dwindle to 3 at 17:00, and stabilizing at a safe 1 as evening sets in, from 18:00 to 19:00. This data showcases the importance of sun protection during the midday hours when the UV radiation is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | 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 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV levels experience significant seasonal changes, peaking during the summer months. January and December have a low UV Index of 2, allowing for longer exposure times without risk of burning (45 minutes). As spring approaches, February sees a moderate increase (UV Index 4, 30 minutes burn time) and by March, the UV Index rises to 6 (high), reducing safe exposure to 25 minutes. The period from April to August is particularly critical, with UV levels reaching their highest at 11 for three consecutive months, which corresponds to an extreme exposure category and a burn time of just 10 minutes. September declines slightly but remains in the very high category with a UV Index of 8. October and November see further reduction, dropping to moderate levels (UV Index 4, 30 minutes) and then back to low by December. To ensure safety, visitors and residents are advised to take precautions during April to August by seeking shade, wearing protective clothing, and using sunscreen to mitigate the higher risk of skin damage during these 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 |
| Erhaodi | 2 | 4 | 6 | 9 | 10 | 11 | 11 | 11 | 8 | 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 |