Last updated: August 1, 2025
In O Mon, Vietnam, staying informed about the UV Index is crucial for your skin's health and overall well-being. Understanding UV levels helps you take necessary precautions to prevent sunburn and long-term skin damage, especially during peak exposure times. With an Aw climate that boasts hot, humid summers, residents and visitors alike face significant UV exposure risks, particularly between 10:00 AM and 1:00 PM when the UV Index can soar to 13. Being aware of these levels empowers you to enjoy the sun safely while protecting your skin.
The UV Index data reveals a dynamic fluctuation throughout the day, peaking at a maximum of 13 around noon. The morning starts off gently, with readings of only 1 at 07:00 and 3 by 08:00, perfect for early risers. However, as the sun ascends, the intensity rises sharply, hitting a critical 10 by 10:00 and reaching its zenith at 12 by 11:00 and 13 by 12:00. The afternoon sees a gradual decline, with values dropping to 9 at 14:00, and then further sliding to 6 by 15:00. As evening approaches, the UV Index dwindles to 3 by 16:00, and finally tails off to 1 by 17:00, nurturing a calmer end to the day. With clear awareness of these fluctuations, individuals can effectively plan their outdoor activities, ensuring protection during the most intense hours.
| 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 | 13 | 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 |
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 |
| O Mon | 10 | 13 | 15 | 14 | 14 | 13 | 13 | 14 | 14 | 13 | 11 | 10 |