Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Cao Bang, Vietnam, a region characterized by its stunning landscapes and a climate that can pose significant sun exposure risks. The UV levels typically peak during midday, with a maximum index of 14 at noon, highlighting the importance of being aware of these levels to protect against sunburn and long-term skin health issues. As Cao Bang experiences a humid subtropical climate (Cwa), it's vital to stay informed about UV exposure to enjoy outdoor activities safely while minimizing skin damage. Knowing the UV Index can empower you to take necessary precautions and make the most of your time in this beautiful locale.
The UV Index today showcases a dramatic rise in solar intensity, starting with a moderate level of 2 at 7:00 AM. As the sun climbs higher in the sky, the intensity peaks at a staggering 14 by noon, marking the most hazardous time for sun exposure. It reaches a maximum of 13 at 1:00 PM, emphasizing the need for protective measures like sunscreen and hats. The afternoon sees a swift decline, dropping to 10 by 2:00 PM and further down to 6 at 3:00 PM. As evening approaches, the UV Index dips to 1 by 5:00 PM, offering some relief, before finally settling at 0 after 7:00 PM. For those planning their day, early morning and late evening provide a safer window for outdoor activities, while midday requires caution to avoid overexposure.
| 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 | 11 | extreme | 10 min |
| 11:00 | 13 | extreme | 10 min |
| 12:00 | 14 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index experiences significant fluctuations throughout the year, with the highest levels occurring from March to October. During this period, particularly May to August, the UV Index reaches extremes, peaking at 14 in July and August, where the recommended maximum exposure time is just 10 minutes. Conversely, the low-risk months include December and January, but even these months exhibit a very high UV Index of 8 and 10, necessitating caution. Visitors and residents are advised to practice sun safety by wearing protective clothing, using broad-spectrum sunscreen, and seeking shade, especially during peak hours from 10 a.m. to 4 p.m. Given the elevated risk in the summer months, vigilance in sun protection is essential to prevent skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hanoi UVI | 8 | 10 | 12 | 12 | 13 | 12 | 12 | 13 | 13 | 11 | 9 | 7 |
| Haiphong UVI | 8 | 10 | 12 | 13 | 12 | 13 | 13 | 13 | 13 | 11 | 9 | 7 |
| Cao Bang | 8 | 10 | 12 | 12 | 13 | 13 | 14 | 14 | 13 | 11 | 9 | 7 |
| Da Nang UVI | 10 | 12 | 14 | 15 | 14 | 13 | 14 | 14 | 13 | 12 | 10 | 9 |
| Ho Chi Minh City UVI | 10 | 13 | 15 | 14 | 14 | 12 | 13 | 14 | 13 | 13 | 11 | 10 |
| Bien Hoa UVI | 10 | 14 | 15 | 15 | 14 | 13 | 14 | 14 | 13 | 12 | 11 | 10 |