Last updated: June 2, 2025
In Changhua, China, understanding the UV Index is crucial for protecting your skin and overall health. As residents enjoy the warm, temperate climate typical of the Cfa zone, they face varying UV exposure throughout the day, with peak levels reaching a significant 12 around midday. Being aware of these fluctuations helps prevent sunburn and long-term skin damage, making it essential for everyone, especially outdoor enthusiasts, to monitor UV levels. With morning signs of manageable UV at 2 and the afternoon intensity climbing to dangerous heights, staying informed and taking appropriate precautions can ensure a safer sun experience in Changhua.
At dawn, the UV Index starts low (2) at 7:00 AM, but quickly escalates. By 9:00 AM, it hits a moderate level of 7, and by 10:00 AM, it peaks at a notable 9, signaling that sun protection is becoming essential. As the sun reaches its zenith at 11:00 AM and 12:00 PM, the UV Index soars to a maximum of 12, categorizing it as very high—a crucial time to seek shade or apply sunscreen. Although the intensity wanes gradually in the afternoon, dropping to 6 by 3:00 PM and 4 by 4:00 PM, the threat dissipates significantly towards the evening, with values falling to 1 by 6:00 PM and finally reaching 0 by 7:00 PM. Always be mindful of these fluctuations to protect your skin!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index fluctuates, reaching its peak during the summer months. January begins with a high risk (UV Index 6), while February escalates to very high (UV Index 8). The high-risk months of March through August highlight the need for caution, particularly from May to August, where the UV Index reaches an extreme level of 12. In these months, the recommended burn time reduces to just 10 minutes; therefore, protection against UV exposure is crucial. As summer fades, September and October still bear a very high UV risk, advising continued vigilance. As temperatures drop, November and December present lower risks with UV Index values of 6 and 5 respectively. Residents and visitors are urged to remain mindful of these UV changes and take appropriate precautions, especially during the sun’s peak 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 |
| 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 |
| Changhua | 6 | 8 | 9 | 10 | 11 | 12 | 12 | 12 | 10 | 8 | 6 | 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 |