Last updated: May 3, 2025
In Herlen, Mongolia, staying aware of the UV Index is crucial for protecting your skin from harmful ultraviolet rays. With peak UV levels soaring to 9 during the midday hours, understanding these fluctuations is essential for preventing sunburn and maintaining overall skin health. Herlen’s Dwc climate offers unique seasonal challenges; although temperatures can be cold, the intense sunlight can still pose significant risks, particularly during the summer months. By monitoring the UV Index, residents and visitors can enjoy the beautiful outdoors while safeguarding themselves against potential skin damage.
The UV Index starts off low at 1 by 7:00 AM, perfect for early risers looking to enjoy the morning sun without worries. As the day progresses, the intensity increases, peaking at 9 between 12:00 PM and 1:00 PM, a clear signal to seek shade and protect your skin during the intense midday hours. From 2:00 PM onward, the UV Index begins to decline, dropping to 6 by 3:00 PM, and tapering off further to 2 by 5:00 PM. As daylight fades, UV levels return to low with 1 by 6:00 PM, making the evening hours more comfortable for outdoor activities. Be mindful of the sun's strength and plan your day accordingly!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 6 | 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 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | 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 |