Last updated: May 3, 2025
Being aware of the UV Index is crucial for residents and visitors of Har-Us, Mongolia, where the dry, high-altitude climate increases the risk of sun exposure. Understanding UV levels not only helps in preventing sunburn but also plays a significant role in maintaining long-term skin health. With peak UV Index readings reaching 10 during the midday hours, it's essential to take precautions, particularly in this BSk climate that often features clear skies. Guarding against harmful ultraviolet rays is vital for enjoying outdoor activities while protecting your skin from damage.
The UV Index for the day displays a dramatic rise as the sun ascends in the sky. Starting at a gentle 1 at 07:00, it quickly escalates through the morning, reaching a moderate 3 by 08:00. As midday approaches, the index peaks at a tenacious 10 at 13:00, suggesting a level of UV exposure that requires immediate attention. After this zenith, the index gracefully declines, dropping to 9 at 14:00 and continuing to fall throughout the afternoon, settling back to a soft 1 by 19:00. Stay protected during those peak hours, especially between 11:00 and 14:00, when the sun's rays are at their strongest!
| 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 | 10 | very high | 15 min |
| 14:00 | 9 | 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, the UV Index experiences significant fluctuations that can impact both residents and visitors. January and December see the lowest UV levels, categorized as low with burn times of 45 minutes. However, as spring approaches, February marks the onset of moderate exposure, transitioning to high levels by March. The summer months, particularly May to August, pose the highest risk with very high UV exposure, featuring burn times as short as 15 minutes. The peak risk is in April and May, where the UV Index reaches 8 and 10 respectively. As fall arrives, UV levels begin to decline, but September remains high with a burn time of 25 minutes. It is crucial for anyone spending time outdoors, especially during the high-risk months of April through August, to take protective measures such as applying sunscreen, wearing protective clothing, and seeking shade during peak hours to reduce the risk of skin damage.
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 |
| OElgii UVI | 2 | 3 | 5 | 7 | 10 | 9 | 9 | 9 | 7 | 5 | 2 | 1 |
| Har-Us | 2 | 3 | 6 | 8 | 10 | 9 | 9 | 8 | 7 | 5 | 2 | 1 |
| Khovd UVI | 2 | 3 | 6 | 7 | 10 | 10 | 9 | 9 | 7 | 5 | 2 | 1 |