Last updated: June 2, 2025
Understanding the UV Index in Nga Sau, Vietnam is crucial for protecting your skin from harmful ultraviolet radiation. With the region's tropical climate, residents and visitors alike face significant risks throughout the day, particularly during the peak hours when UV levels can soar to a staggering 13 by noon. Being aware of these levels helps prevent sunburn and long-term skin damage, ensuring a healthier lifestyle under the Vietnamese sun. As you enjoy outdoor activities, keep an eye on the UV Index to stay safe and maintain your skin health.
As the sun rises, the UV Index starts off low at 1 by 07:00, perfect for a leisurely morning. However, it quickly climbs to 3 by 08:00 and then skyrockets to a peak of 13 by noon. The intensity of the sun is unmistakable, with the highest reading of 12 at 11:00 and gradually tapering off through the afternoon. By 15:00, the index drops to 5, providing a brief respite before sinking to 3 by 16:00 and ultimately returning to 1 by 17:00. As daylight fades, UV exposure diminishes, ending the day at a safe 0 by 19:00. This data serves as a reminder to protect your skin during peak hours, especially between 10:00 and 14:00, when the UV Index soars to its highest levels!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 10 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 5 | moderate | 30 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, the UV Index experiences significant changes, particularly peaking in the first half. January starts with a UV Index of 10, categorized as very high, where a burn can occur in just 15 minutes. However, the intensity escalates dramatically from February to April, with the UV Index reaching a maximum of 15 in March, classified as extreme, necessitating vigilance as burn times shrink to just 10 minutes. This high-risk period continues through May, June, July, and into August, with similar UV levels persisting and caution advisable. As the year progresses into the fall, the UV Index remains elevated, particularly in September and October, yet begins to taper off by November and December with a return to very high levels but longer burn times of 15 minutes again. Visitors and residents are advised to take necessary precautions—such as wearing sunscreen, protective clothing, and seeking shade—especially during the peak months from February to October when UV exposure poses a greater risk.
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 |
| 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 |
| Nga Sau | 10 | 13 | 15 | 14 | 14 | 13 | 13 | 14 | 14 | 13 | 11 | 10 |