Last updated: June 2, 2025
In Tsahir, Mongolia, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn, especially in the region's Dwc climate, characterized by cold winters and warm summers. With UV levels peaking at a significant 10 during the midday hours, understanding these fluctuations helps residents and visitors take proactive measures against harmful sun exposure. As the sun's rays can be deceptively intense, particularly from 11 AM to 2 PM, staying informed about the UV Index not only protects your skin but also promotes long-term health in this stunning environment.
As the sun climbs higher in the sky, the UV Index rises dramatically throughout the day. Beginning at a gentle 1 at 07:00, it ramps up to a moderate 3 by 09:00. The peak unfolds between 12:00 and 14:00, with a maximum of 10, signaling a high risk for unprotected skin. After this peak, the index gradually declines, dropping to 5 by 17:00 and then to a softer 1 by the evening at 19:00. For those enjoying outdoor activities, it's crucial to be mindful of the midday sun's intensity and take appropriate precautions during those peak UV hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits notable seasonal variations, with significant increases during the summer months. January and December are characterized by a low exposure category (UV Index 2), allowing for longer burn times of 45 minutes. In February, UV levels begin to rise to a moderate level (UV Index 3) with a burn time of 30 minutes, indicating increased sun exposure risk. By March, the UV Index reaches high levels (6), leading into April and May, when it escalates to very high (9-10) with burn times dropping to just 15 minutes. The peak of the risk persists through July and August, necessitating extra precautions as the UV Index remains at 10. As summer wanes, September and October see a slight reduction in levels (7 and 6), but still warrant attention due to their high classification. November returns to a moderate classification, and by December, the cycle concludes with a return to low UV levels. Visitors and residents should take precautionary measures especially during the high-risk months of April to August, by wearing protective clothing, applying sunscreen, and seeking shade during peak sun 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 |
| 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 |
| Tsahir | 2 | 3 | 6 | 9 | 10 | 10 | 10 | 9 | 7 | 6 | 3 | 2 |