Last updated: June 2, 2025
In Herlen, Mongolia, being mindful of the UV Index is crucial for safeguarding your skin against harmful ultraviolet radiation. Understanding the varying UV levels throughout the day can significantly aid in sunburn prevention and maintaining overall skin health. With a Dwc climate that features intense sun exposure, particularly during midday hours when the UV Index peaks at 9 around noon, residents and visitors alike should stay informed on protective measures to enjoy the outdoors safely. Embracing UV awareness is essential for making informed choices about sun protection in this beautiful region.
As the sun rises, so does the UV Index in a fascinating daily dance. Starting at a modest 1 by 7:00 AM, the intensity quickly climbs to 3 by 8:00 AM, signaling a gentle awakening. By 10:00 AM, it peaks at 7, offering an ideal time for outdoor enthusiasts to bask in nature. The zenith occurs at 12:00 PM and 1:00 PM, where the UV Index reaches an exhilarating 9, urging sun-seekers to take precautions. As midday wanes, the index softly descends, resting at 3 by 5:00 PM and finally settling back to 1 by 7:00 PM. This hourly journey illustrates nature's rhythm, reminding us to cherish the sun while staying safe.
| 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 | 8 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index values exhibit notable seasonal changes, significantly affecting sun exposure safety for both visitors and residents. The highest risk months for UV exposure are from May through August, where the Index peaks at a very high level of 9, indicating a burn time of just 15 minutes during peak sunlight hours. April marks the transition to higher risk with a high UV Index of 7, and as we move into September, the risk lowers to high at 6, allowing for a longer burn time of 25 minutes. In contrast, the winter months of January, November, and December present much lower risk levels, with UV Index values ranging from 1 to 2 and burn times of up to 45 minutes. Accordingly, it is crucial for everyone to take appropriate sun protection measures, especially during the high-risk months, such as wearing sunscreen, protective clothing, and seeking shade during peak hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Darhan UVI | 1 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 6 | 4 | 2 | 1 |
| Erdenet UVI | 2 | 3 | 5 | 7 | 8 | 9 | 9 | 8 | 6 | 4 | 2 | 1 |
| Ulan Bator UVI | 2 | 3 | 5 | 7 | 9 | 9 | 9 | 9 | 6 | 4 | 3 | 1 |
| Herlen | 2 | 3 | 5 | 7 | 9 | 9 | 9 | 9 | 6 | 4 | 2 | 1 |
| OElgii UVI | 2 | 3 | 5 | 7 | 10 | 9 | 9 | 9 | 7 | 5 | 2 | 1 |
| Khovd UVI | 2 | 3 | 6 | 7 | 10 | 10 | 9 | 9 | 7 | 5 | 2 | 1 |