Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Thuan Nam, Vietnam, where the sun's intensity can reach dangerous levels. As an area with an Aw climate, Thuan Nam experiences warm temperatures year-round, which translates to significant UV exposure, particularly between 10 AM and 2 PM when indexes can peak at 13, indicating a high risk of harm from unprotected sun exposure. By keeping an eye on UV levels, you can effectively prevent sunburn, protect your skin health, and enjoy outdoor activities safely. Armed with this knowledge, you’ll be better equipped to enjoy Thuan Nam's beautiful sights without compromising your well-being.
The UV index throughout the day presented a striking pattern of increasing intensity, peaking at 11:00 AM and 12:00 PM with a notable score of 13. Early risers at 7:00 AM enjoyed a low UV level of 2, which steadily climbed to 4 by 8:00 AM. The index surged dramatically as the sun reached its zenith, hitting a high of 10 by 10:00 AM and continuing to escalate until noon. Post-lunch hours saw a gradual decline, with values easing to 11 at 1:00 PM, then decreasing to 9 by 2:00 PM. The UV intensity diminished further in the late afternoon, dropping to 5 at 3:00 PM, and finishing the day at a mere 0 by 7:00 PM. This data underscores the importance of sun protection during peak hours, particularly between 10 AM and 2 PM when UV rays are most intense.
| 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 | 5 | moderate | 30 min |
| 16:00 | 2 | low | 45 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 reveals extreme levels of solar radiation, particularly from January to September, with peak values reaching 16 in March. These high-risk months, especially February, March, and April, require vigilance, as the burn time is a mere 10 minutes for most. While October to December sees a slight decrease in UV exposure, November and December still present significant risk, with UV indexes of 11 and 10 respectively, suggesting a very high exposure category in December. Therefore, it is crucial for visitors and residents to take protective measures year-round, such as wearing sunscreen, protective clothing, and sunglasses, and seeking shade during peak sun hours to minimize the risk of harmful UV exposure.
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 |
| Thuan Nam | 11 | 14 | 16 | 15 | 15 | 13 | 13 | 14 | 14 | 13 | 11 | 10 |