Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Sumber, Mongolia, where sun exposure can vary dramatically throughout the day. With a Dwb climate, the region experiences distinct seasonal shifts, and during the summer months, UV levels can peak significantly—reaching a maximum of 9 on sunny days from 11:00 AM to 1:00 PM. Awareness of these levels is essential to prevent sunburn and maintain skin health, as even moderate UV exposure can lead to lasting damage. By staying informed about the UV Index, locals can take proactive steps to enjoy the sun safely!
The UV Index displays a notable trend throughout the day, peaking at 9 during the midday hours of 11:00 to 13:00. Starting from a gentle 2 at 07:00, the index steadily climbs, reaching a moderate 4 by 08:00 and escalating to a significant 7 by 10:00. The highest point, 9, signals a prime time for sun exposure, making sun protection essential. As the afternoon progresses, the index gradually declines, falling back to 7 at 14:00 and dipping to 5 by 15:00. By evening, the UV levels drop to a low 1 by 19:00, indicating a safer time for outdoor activities without intense sun risks. Remember to stay safe and protected during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 5 | moderate | 30 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 |
| Sumber | 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 |