Last updated: June 2, 2025
Understanding the UV Index is vital for residents of Runsong, China, especially given the region's humid subtropical climate (Cfa), which often leads to elevated sun exposure risks. With peak UV levels reaching as high as 12 around noon, awareness of UV levels is essential for preventing sunburn and promoting long-term skin health. By knowing when to take precautions—like wearing sunscreen or seeking shade—you can protect yourself and your loved ones from the harmful effects of UV radiation, ensuring a safe and enjoyable outdoor experience in this sun-kissed locale.
The UV Index throughout the day showcases a stark increase as the sun rises, starting from a mild 1 at 07:00 and peaking at a striking 12 between 12:00 and 13:00. This significant surge highlights the importance of sun protection, especially during the hours when the index reaches maximal levels of 10 at 11:00 and 11 at 14:00. As the afternoon wanes, the UV Index begins to decline, dropping to 8 by 15:00 and finishing the day with a gentle return to 1 by 19:00. This data serves as a crucial reminder to prioritize sun safety during midday hours when UV exposure is at its highest.
| 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 | 8 | very high | 15 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, seasonal UV changes demonstrate a significant increase in UV Index values, particularly from February to September, where the index consistently reaches very high to extreme levels. The high-risk months are identified as March to September, with peak indices of 13 in May, July, and August, indicating an extreme risk of harm from unprotected sun exposure, with burn times as short as 10 minutes. Residents and visitors are advised to take precautionary measures during these months by seeking shade, wearing protective clothing, and applying broad-spectrum sunscreen frequently to safeguard against harmful UV radiation. In contrast, January, October, and November mark relatively lower UV indexes, yet caution should still be exercised, especially in January and October, which have significantly shorter burn times of 25 and 15 minutes, respectively. As December approaches, the UV risk decreases to a moderate level, allowing for more extended safe sun exposure of up to 30 minutes.
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 |
| Runsong | 7 | 8 | 10 | 11 | 13 | 12 | 13 | 13 | 11 | 10 | 8 | 5 |
| 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 |