Last updated: June 2, 2025
Understanding the UV Index in Shimen, China is crucial for protecting your skin and overall health. With the region's humid subtropical climate (Cwb), sunlight can be intense, especially during peak hours when the UV Index reaches alarming levels, peaking at 15 around noon. Being aware of these UV levels is vital for preventing sunburn and reducing long-term skin damage. Whether you're enjoying outdoor activities or simply soaking up the sun, knowing when to seek shade and apply sunscreen can make all the difference in maintaining healthy skin in Shimen's varying UV exposure risks throughout the day.
The UV Index throughout the day exhibits a striking pattern, beginning with a mild level of 1 at 7 AM and 8 AM, slowly rising to a moderate 3 by 9 AM. However, as the sun climbs higher, so does the intensity, peaking dramatically at 15 around 1 PM. 12 PM sees the UV Index reach an impressive 13, and just before 1 PM, it hits its zenith at 15. The afternoon brings a gentle decline, dipping to 12 by 3 PM and further declining to 5 at 5 PM. As the sun sets, the UV levels drop back to manageable levels, ending the day at 1 by 7 PM. This data underscores the critical importance of sun protection during the peak hours, particularly between 11 AM and 3 PM when UV exposure is at its most intense.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 15 | extreme | 10 min |
| 14:00 | 14 | extreme | 10 min |
| 15:00 | 12 | extreme | 10 min |
| 16:00 | 9 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV exposure varies significantly, with the highest levels occurring from March to October. During these months, specifically March through August, the UV Index reaches extreme levels, peaking at 16 in July, which corresponds to a burn time of just 10 minutes. Residents and visitors should be particularly cautious in these high-risk months, taking protective measures such as wearing sunscreen, hats, and UV-protective clothing when outdoors. January and February also exhibit very high UV levels, indicating that sun protection is essential even in winter. November sees a slight decrease but remains very high, while December offers a respite with a high exposure category and a longer burn time of 25 minutes. It is crucial for everyone to remain vigilant against UV exposure year-round, adjusting their sun safety practices according to these seasonal shifts.
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 |
| 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 |
| Shimen | 8 | 9 | 11 | 13 | 14 | 15 | 16 | 15 | 14 | 12 | 9 | 7 |