Last updated: May 3, 2025
In Bayan, Mongolia, awareness of the UV Index is crucial for maintaining skin health and preventing sunburn, especially during the warm summer months. With a BSk climate, residents and visitors alike can experience varying UV exposure risks throughout the day. For instance, peak UV levels can soar to 8 around midday, making it essential to understand these fluctuations to protect your skin from harmful rays. By keeping an eye on the UV Index, you can enjoy the sunny days while minimizing the risk of skin damage.
The UV Index throughout the day showcases a clear peak between 11:00 AM and 1:00 PM, where it reaches a maximum of 8, indicating a high potential for harm from unprotected sun exposure. As morning breaks at 7:00 AM, the index starts gently at 1, making for relatively safe conditions. By 9:00 AM, it climbs to 4, prompting those heading outdoors to consider protective measures. The afternoon brings the most intensity, with readings holding steady at 8 before gradually dropping to 6 and then tapering off into the evening, descending to 1 by 7:00 PM. To stay safe under the sun, individuals are advised to take precautions during the peak hours of 11:00 AM to 1:00 PM.
| 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 | 8 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Seasonal UV changes highlight a significant increase in UV exposure from winter to summer. January and February present low to moderate UV levels, with burn times ranging from 30 to 45 minutes. However, by March and April, the UV Index escalates to moderate and high levels, respectively, with increased caution advised. The months of May through August are particularly high-risk, marked by very high UV levels (Indices 8-9) and a dangerously short burn time of just 15 minutes. As we transition into September, the UV Index drops to high but still poses a risk, while October through December return to low UV levels. Visitors and residents should prioritize sun safety measures during the high-risk months of May to August, including wearing sunscreen, protective clothing, and seeking shade, to minimize the risk of sunburn and long-term 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 |
| Bayan | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 9 | 6 | 4 | 2 | 2 |
| 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 |