Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Chongshan, China, where the sun's rays can be particularly intense. With a climate categorized as Dwb, the city experiences significant sun exposure, especially during midday hours when UV levels peak at a severe 11. Being aware of UV levels helps individuals take preventive measures against sunburn and supports long-term skin health. As the sun rises, the UV Index climbs quickly from a moderate 3 to an alarming 10 by 11 AM, emphasizing the need for proactive sun protection to enjoy outdoor activities safely in this vibrant city.
The UV Index throughout the day showcases a dynamic picture of sun exposure, peaking dramatically at 12:00 PM with a striking 11. As the sun rises, the index starts at a modest 2 at 7:00 AM, gradually climbing to a moderate 5 by 9:00 AM. The intensity surges past 8 at 10:00 AM, reaching its maximum intensity of 10 by 11:00 AM. From noon to 1:00 PM, it remains at 10, then starts a slow decline to 9 at 2:00 PM and continues to decrease through the afternoon. By 5:00 PM, the index drops to a safer 2, making the late hours more suitable for outdoor activities, with values falling to 1 by 6:00 PM and beyond. As the day winds down, it’s clear that the midday sun demands respect and preparation to enjoy the outdoors safely.
| 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 | 10 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, the UV Index fluctuates significantly, impacting exposure levels and burn times. January and February see moderate UV levels (3-4), requiring about 30 minutes for burn time. However, by March, UV exposure rises to a high level (6) with a reduced burn time of 25 minutes. The risk peaks from April to August, where UV Index values soar to a maximum of 11 (extreme), allowing for a mere 10 minutes before burn occurs. September decreases to a very high UV Index of 8, while October offers slight relief at a high level (6). Finally, November and December reflect moderate to low UV levels, with burn times extending back to 30 and 45 minutes, respectively. Visitors and residents are advised to exercise caution, particularly during the high-risk months of April through August, by wearing sunscreen, protective clothing, and seeking shade during peak sun hours.
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 |
| Chongshan | 3 | 4 | 6 | 8 | 9 | 11 | 11 | 11 | 8 | 6 | 3 | 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 |