Last updated: June 2, 2025
In Hoan Lao, Vietnam, understanding the UV Index is crucial for protecting your skin and overall health. As the sun rises over this beautiful region, UV levels can skyrocket, especially around midday when they reach a high of 13. Being aware of these UV levels can help you prevent painful sunburns and reduce the risk of long-term skin damage. With a climate that often batters its residents with intense sun exposure, especially during the summer months, it’s essential to stay informed and take necessary precautions to enjoy the outdoors safely. Remember, even on cloudy days, harmful UV rays can penetrate through the clouds, so understanding the UV Index is key to a healthy lifestyle in Hoan Lao.
The UV Index throughout the day showcases a striking pattern of intensity, peaking sharply around 11:00 AM and 12:00 PM with a robust 13, signaling a high risk for sun exposure during these hours. Early morning starts gently at 2 at 7:00 AM, then steadily climbs, passing through moderate levels at 8:00 AM and 9:00 AM, before reaching a critical point with a 10 at 10:00 AM. Post-noon, the index gradually declines, dropping to 6 by 3:00 PM and further to a much safer 1 by the evening at 5:00 PM and 6:00 PM, where it ultimately settles at 0 by nightfall. To enjoy the sun while protecting your skin, plan outdoor activities early or enjoy them after the peak hours!
| 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 | 12 | 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 |
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 |
| Hoan Lao | 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 |