Last updated: June 2, 2025
In Uliastay, Mongolia, awareness of the UV Index is crucial for safeguarding your skin health against harmful ultraviolet rays. With peak UV levels reaching as high as 10 around noon, understanding these fluctuations can help you take the necessary precautions to prevent sunburn and long-term skin damage. Uliastay's Dwc climate features cold winters but offers a significant amount of sunshine, which means residents and visitors alike should be especially vigilant during the sunnier months. By staying informed about the UV Index, you can enjoy the beautiful outdoors while protecting your skin from potential harm.
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 |
As the seasons change, so too does the UV Index, significantly affecting the risk of skin damage from sun exposure. January and December see a low UV Index of 2, allowing for safe exposure of about 45 minutes. The UV levels begin to rise in February with a moderate index of 3, highlighting the need for awareness as burn times decrease to 30 minutes. March and April present high levels at 6 and 7, respectively, with a burn time of just 25 minutes. The peak risk occurs between May and August, where the UV Index consistently hits 10 and 9, involving very high exposure with a swift burn time of merely 15 minutes. As autumn arrives in September, the index drops to 7, followed by moderate levels back in October and November. Visitors and residents are strongly advised to take precautionary measures, such as applying sunscreen, wearing protective clothing, and seeking shade, especially during the high-risk months of March through August.
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 |
| Uliastay | 2 | 3 | 6 | 7 | 10 | 10 | 10 | 9 | 7 | 5 | 3 | 2 |