Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Sumiyn Bulag, Mongolia, where exposure to ultraviolet rays can significantly impact skin health and sunburn prevention. With a climate classified as Dwc, this region experiences unique seasonal variations in UV radiation, particularly during the peak hours when the UV levels can soar to 9, indicating very high risk. By staying informed about the daily UV Index, locals can take essential precautions against harmful sun exposure, ensuring their skin remains protected and healthy throughout the year.
At dawn, the UV Index starts off modestly at 2 by 7:00 AM, gradually rising as the sun climbs. By 9:00 AM, it hits 5, indicating a moderate risk. The peak occurs around 12:00 PM with a staggering 9, signaling a high level of UV exposure, perfect for applying that sunscreen! As the afternoon unfolds, numbers begin to taper off, falling back to 6 at 3:00 PM and then declining to 2 by the time the sun sets. The evening hours bring a welcomed relief, with the UV Index settling at 1 by 6:00 PM and staying low, making it a safe time to enjoy outdoor activities without much concern. Overall, expect a sun-soaked day with the greatest caution needed during those midday hours!
| 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 | 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 |
Throughout the year, UV Index levels fluctuate significantly, with the highest risk occurring during the summer months. January and February present low UV exposure with an index of 1-2, allowing for safe outdoor activities without much concern, as the burn time extends to 45 minutes. By March, the UV Index rises to 4, indicating moderate exposure; thus, a reduction in burn time to 30 minutes is advised. April to August marks the height of UV intensity, with values peaking at 9 in July, categorizing this period as very high risk for skin damage and shortening burn time to just 15 minutes. Visitors and residents should prioritize sun protection during these months, wearing sunscreen, protective clothing, and seeking shade, particularly in May, June, July, and August. As summer ends, UV levels decrease, returning to moderate in October, and then dropping back to low in November and December, where the burn time increases again to 45 minutes. Overall, being vigilant about sun exposure, particularly from April to August, is key to maintaining skin health.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sumiyn Bulag | 1 | 2 | 4 | 6 | 8 | 8 | 9 | 8 | 6 | 4 | 2 | 1 |
| 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 |