Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Dien Bien Dong, Vietnam—a region that experiences a humid subtropical climate with intense sun exposure, particularly between late morning and early afternoon. Awareness of UV levels not only helps in preventing sunburn but is also vital for long-term skin health. With UV Index values peaking at a significant 15 around noon, it is essential to take protective measures to mitigate the risks associated with high UV radiation. By staying informed about these levels, you can enjoy the beautiful outdoors while safeguarding your skin from the harmful effects of the sun.
As the sun climbs higher, so does the UV Index, peaking at a striking 15 at noon. Starting off the day at a mild 2 at 07:00, the index steadily rises, reaching 11 by 10:00. By 11:00, it soars to 14, highlighting the intensity of ultraviolet radiation. It's at 12:00 that the UV Index hits its highest point, urging caution for those outdoors. As the afternoon progresses, the index gradually declines to 10 at 14:00, before dipping further to 1 by 17:00. As evening settles in, the UVI drops to 0 by 19:00, signaling that the day’s sunburn risk has passed. Stay protected during those midday hours when UV exposure is at its peak!
| 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 | 14 | extreme | 10 min |
| 12:00 | 15 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index exhibits significant seasonal changes, with high-risk months predominantly occurring from February to October. During this period, the UV Index reaches extreme levels, peaking in May and July at an index of 15, which corresponds to a burn time of just 10 minutes. January begins with a very high UV Index of 9, while exposure levels gradually rise until reaching their peak in the summer months. In November and December, the UV Index decreases to 10 and 8, respectively, where the burn time increases to 15 minutes. Visitors and residents are advised to take precautions during these high-risk months, such as wearing protective clothing, applying broad-spectrum sunscreen, and limiting sun exposure, especially during peak hours. Adhering to these guidelines can help mitigate the risk of skin damage and ensure a safer outdoor experience.
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 |
| Dien Bien Dong | 9 | 11 | 13 | 13 | 15 | 14 | 15 | 14 | 14 | 12 | 10 | 8 |
| 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 |