Last updated: June 2, 2025
Understanding the UV Index in Bayan-Uhaa, Mongolia is essential for protecting skin health and preventing sunburn, especially during the peak sunshine hours. With a climate classified as Dwc, residents and visitors are exposed to significant UV radiation, particularly around midday when levels can soar to 9—indicating a high risk of harm from unprotected sun exposure. By staying informed about UV levels, you can take necessary precautions to safeguard your skin and enjoy the outdoors safely. Whether you’re hiking in the stunning surrounding areas or simply enjoying a sunny day, awareness of the UV Index is your first line of defense against the sun’s harmful effects.
As the sun rises, the UV Index begins to climb, starting at a gentle 2 at 07:00. By 08:00, it reaches 3, hinting at a bright day ahead. The intensity peaks at 12:00, hitting an impressive 9, signaling that it's crucial to take sun safety measures during these hours. The UV Index remains elevated at 8 until 14:00, before gradually descending to 4 by 16:00. As the afternoon fades into evening, the index drops to a comfortable 1 by 18:00 and remains there until 19:00. Overall, it’s a day where sun protection is key, especially from late morning to early afternoon when the UV rays are at their strongest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | 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 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV levels fluctuate significantly, with the highest risk occurring from April to August. In these months, the UV Index peaks at 10 in May and remains at 9 from June to August, indicating very high exposure risk with a burn time of only 15 minutes. Visitors and residents should take precautions during these high-risk months, such as wearing sunscreen with adequate SPF, protective clothing, and seeking shade during peak hours. Conversely, the months of January, November, and December have a low UV Index of 2, allowing for more carefree outdoor activities. However, as UV levels increase in the spring, it's essential to remain vigilant to protect skin health during peak sunlight 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 |
| Bayan-Uhaa | 2 | 3 | 6 | 8 | 10 | 9 | 9 | 9 | 6 | 5 | 2 | 2 |
| Khovd UVI | 2 | 3 | 6 | 7 | 10 | 10 | 9 | 9 | 7 | 5 | 2 | 1 |