Last updated: July 2, 2025
Understanding the UV Index in Nui Doi, Vietnam, is crucial for protecting your skin and overall health. With the average climate categorized as Cwa, this region experiences significant sunlight throughout the year, leading to elevated UV levels, especially during midday when the index peaks at 13. By staying aware of UV Index readings, you can take proactive measures against sunburn and long-term skin damage, ensuring that your outdoor adventures remain safe and enjoyable. Remember, knowledge of the UV levels can make all the difference in minimizing risks associated with excessive sun exposure!
As the day unfolds, the UV Index reveals a dramatic rise in sun intensity. Starting at a mild 2 at 7:00 AM, the index quickly escalates to a moderate 4 by 8:00 AM. The real heat hits at 9:00 AM with a 7, peaking at an intense 10 around 10:00 AM. By 11:00 AM, the UV Index reaches its zenith at 13, remaining high until 12:00 PM. The numbers dip slightly to 11 at 1:00 PM and then to 9 by 2:00 PM, before gently declining to 6 at 3:00 PM. As the sun begins to set, the index falls steadily to 3 at 4:00 PM, and drops to 1 by 5:00 PM, maintaining that low level into the evening with a final 0 at 7:00 PM. This data underscores the need for sun protection during peak hours, particularly from 10 AM to 1 PM when the sun's rays are most powerful!
| 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 | 10 | very high | 15 min |
| 11:00 | 13 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | 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 |
Throughout the year, UV Index levels fluctuate significantly, with the highest risk months being from March to October, where values consistently reach extreme levels of 10 or above. Specifically, April, June, July, August, and September all see a peak UV Index of 13, necessitating only 10 minutes of exposure before potential skin damage occurs. In contrast, the UV Index is at its lowest in December and January, with values of 7 and 8, respectively, making burn times of 25 and 15 minutes more tolerable. Visitors and residents are strongly advised to take precautionary measures during the high-risk months by wearing sunscreen, protective clothing, and seeking shade to minimize skin damage. Stay vigilant to ensure your safety while enjoying outdoor activities!
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 |
| Nui Doi | 8 | 10 | 12 | 13 | 12 | 13 | 13 | 13 | 13 | 11 | 9 | 7 |
| Haiphong UVI | 8 | 10 | 12 | 13 | 12 | 13 | 13 | 13 | 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 |