Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Bayan, Mongolia, where the high-altitude climate can lead to elevated UV exposure risks. With UV levels peaking at 10 during midday, it's essential to recognize how these readings correlate with sunburn prevention and overall skin health. Awareness of the UV Index helps you take proactive measures against harmful effects, ensuring you enjoy the sunny days while safeguarding your skin. In Bayan's BSk climate, where sunlight can be intense, knowing the daily UV risks empowers you to make informed decisions about outdoor activities and sun protection. Stay safe, stay informed!
The UV Index throughout the day reveals a clear pattern of increasing intensity under the sun. Starting the morning at a moderate level of 2 at 07:00, the index gradually rises to a notable 3 by 08:00. By 09:00, it reaches a peak of 5, but the real intensity hits as it climbs to a significant 7 at 10:00. The sun’s potency peaks around 12:00, soaring to a maximum of 10, with this level sustained until 13:00. As the afternoon unfolds, the intensity begins to wane, dropping to 9 by 14:00 and then tapering down to 7 at 15:00. The evening ushers in a gentle decline, with the UV Index falling to 3 at 17:00, and finally settling at a low 1 by 19:00. Always remember to protect your skin, especially during peak hours when UV exposure is at its highest!
| 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 | 9 | very high | 15 min |
| 12:00 | 10 | 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 varies significantly, indicating seasonal changes in UV radiation. From January to March, UV levels are generally low to moderate, with the highest burn time of 45 minutes in January and a moderate level of 30 minutes in February and March. April marks the beginning of higher risk, with a UV Index of 7 and a burn time of 25 minutes. The peak risk months are May to August, where the UV Index reaches 10, requiring only 15 minutes of sun exposure before risking skin damage. September sees a decrease to 7, while October and November return to moderate levels of 30 minutes of burn time. Meanwhile, December's UV Index drops back to 2, indicating low exposure risk again. Visitors and residents should take precautions from April through August, such as wearing sunscreen, hats, and protective clothing, to minimize their risk of UV-related harm.
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 | 2 | 3 | 5 | 7 | 10 | 10 | 9 | 9 | 7 | 5 | 3 | 2 |