Last updated: August 1, 2025
Understanding the UV Index is crucial for residents and visitors of Dong Hoi, Vietnam, where the tropical climate brings with it significant sun exposure. With UV levels reaching as high as 14 around midday, awareness of these levels is essential for sunburn prevention and maintaining long-term skin health. Protecting yourself from harmful rays not only helps avoid painful burns but also reduces the risk of skin-related ailments later in life. As Dong Hoi enjoys its warm, sunny days, staying informed about the daily UV Index can empower individuals to enjoy the outdoors responsibly and safely.
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 | 14 | 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, peaking during the spring and summer months. From February to October, the index remains in the extreme category with values consistently ranging from 11 to 14, indicating an urgent need for sun protection. Specifically, the highest risk months are March, April, July, and August where the UV Index reaches 14, and the burn time is as little as 10 minutes. Conversely, during the winter months, notably January and February, while still dangerous, the UV Index sees a slight decrease to 9 and 11 respectively. Residents and visitors are advised to take precautionary measures such as wearing sunscreen, protective clothing, and seeking shade, especially during peak hours, to minimize the risk of skin damage year-round.
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 |
| Dong Hoi | 9 | 11 | 13 | 14 | 14 | 13 | 14 | 14 | 13 | 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 |