Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Ad Dann, Yemen, where the arid BWh climate brings intense sunlight year-round. With UV levels often peaking at a staggering 11 around midday, awareness of these UV values plays a vital role in preventing sunburn and safeguarding skin health. By learning about the daily fluctuations in UV exposure, you can effectively protect yourself from the harmful effects of the sun, ensuring that your outdoor activities remain enjoyable and safe, even in the hottest hours. Don’t underestimate the power of the sun—staying informed is your first line of defense!
As the sun rises, the UV Index starts low at 1 by 7:00 AM, but it quickly climbs as the day unfolds. By 9:00 AM, it reaches a moderate 5, signaling it’s time to apply sunscreen. The intensity peaks around 12:00 PM, hitting a maximum of 11, indicating a high risk of harm from unprotected sun exposure. After that peak, the UV levels gradually decline throughout the afternoon: 10 at 1:00 PM, and then tapering off to 5 by 3:00 PM. As the sun begins its descent, the index drops back to 3 at 4:00 PM and continues to fall, ending the day on a cool 0 by 7:00 PM. It’s a clear reminder to stay protected during the sun's most potent hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | 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 notable fluctuations, with the highest levels occurring from February to May and again during July to September, categorizing these months as high-risk for sun exposure. Specifically, March and April reach an extreme UV Index of 12 and 13, necessitating extreme caution, as the burn time can be as short as 10 minutes. Visitors and residents should take proactive measures during these months, including wearing broad-spectrum sunscreen, protective clothing, and seeking shade, particularly during midday hours when UV exposure peaks. As we transition to June and then to October, UV levels decrease to 10, transitioning back to a very high exposure category. November and December maintain a UV Index of 9, indicating that sun protection remains important even in cooler months. Always assess the UV Index before outdoor activities to ensure adequate protection from harmful UV rays.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Al Hudaydah UVI | 9 | 10 | 11 | 13 | 12 | 10 | 9 | 9 | 9 | 9 | 8 | 8 |
| Ad Dann | 10 | 11 | 12 | 13 | 12 | 10 | 11 | 11 | 11 | 10 | 9 | 9 |
| Aden UVI | 10 | 11 | 13 | 14 | 13 | 10 | 11 | 12 | 10 | 10 | 9 | 9 |
| Taiz UVI | 10 | 12 | 13 | 14 | 13 | 10 | 12 | 12 | 11 | 11 | 10 | 9 |
| Mukalla UVI | 11 | 12 | 13 | 14 | 14 | 12 | 12 | 12 | 12 | 11 | 10 | 9 |
| Sanaa UVI | 12 | 13 | 15 | 16 | 15 | 14 | 13 | 13 | 14 | 13 | 11 | 10 |