Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Bayan-Ulaan, Mongolia, where the unique Dwc climate can lead to significant sun exposure risks. With peak UV levels soaring to 10 between 12:00 PM and 2:00 PM, awareness of these fluctuations is vital for preventing sunburn and protecting skin health. As the sun's intensity can change dramatically throughout the day, staying informed about UV levels helps you enjoy the outdoors safely while minimizing the risk of long-term skin damage. Whether you’re exploring the vibrant city or soaking in the natural beauty, knowing the UV Index can make all the difference in your sun safety routine.
Today's UV Index presents an intriguing curve, starting the day with a mellow maximum of 1 at 07:00. As the sun climbs higher, things heat up quickly—by 10:00, the index reaches 6, and by 12:00, it peaks at an intense 10. This level remains steady until 14:00, urging sun enthusiasts to take precautions. As the afternoon fades, the UV Index gracefully tapers off, dropping to 4 by 17:00, and finally sinking back to a gentle 1 by 19:00. With mid-day UV levels soaring, it’s crucial to stay protected during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 10 | 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 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal changes, with the highest values occurring during the summer months. From April to August, the UV Index peaks at 10, indicating a very high risk of harm from unprotected sun exposure, with a critical burn time of only 15 minutes. Conversely, the winter months of January and December show a low UV Index of 2, allowing for safer, extended exposure up to 45 minutes. The high-risk months for sun exposure are clearly identified as April through August, recommending that both visitors and residents take extra precautions during this period. It is advisable to wear protective clothing, use sunscreen, and seek shade, especially when the sun is at its peak. As we transition into September and October, while the risk decreases to high and moderate categories respectively, it’s still essential to be vigilant against UV exposure.
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 |
| Bayan-Ulaan | 2 | 3 | 6 | 10 | 10 | 10 | 10 | 10 | 7 | 5 | 3 | 2 |