Last updated: June 2, 2025
Understanding the UV Index is crucial for the residents of Ulaan-Ereg, Mongolia, where the impact of sun exposure can be significant due to the region's semi-arid climate. With peak UV levels often soaring to 10 during midday hours, being aware of these fluctuations is vital for preventing sunburn and protecting overall skin health. As outdoor activities are common in this vibrant area, knowing when UV risks are highest can help you enjoy the sun safely while minimizing potential harm. Make informed choices based on the local UV Index to keep yourself and your loved ones safe under the Mongolian sun!
At dawn, the UV Index starts low at 1 by 7:00 AM, but as the sun rises higher, the intensity of UV radiation ramps up quickly. By 10:00 AM, it reaches 7 and continues to climb, peaking at an impressive 10 by 1:00 PM. This is the most critical time for sun exposure, with the index staying high at 9 until 2:00 PM. As the afternoon progresses, it gradually declines, dropping to 5 by 4:00 PM, then 3 by 5:00 PM, and finally returning to a safe 1 by 7:00 PM. Remember to protect your skin during those mid-day hours when UV levels are at their most dangerous!
| 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 | 7 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 9 | 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, UV Index levels exhibit significant seasonal variations, with the highest risk for UV exposure occurring from May to August. In these months, the UV Index reaches very high levels (9-10), indicating a burn time as short as 15 minutes. Conversely, from December to February, UV exposure is generally low to moderate (UV Index 2-3), allowing for longer safe exposure times. Residents and visitors are advised to take extra precautions during the high-risk months—applying sunscreen regularly, wearing protective clothing, and seeking shade during peak hours—to minimize the risk of harmful UV exposure. As summer transitions to fall, the risk decreases, but caution should still be exercised during March and April when UV levels begin to rise.
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 |
| Ulaan-Ereg | 2 | 3 | 5 | 7 | 9 | 10 | 9 | 9 | 7 | 4 | 3 | 2 |
| 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 |