Last updated: August 1, 2025
In Ulaantolgoy, Mongolia, being aware of the UV Index is essential for protecting your skin and overall health. Understanding UV levels helps you prevent sunburn and reduce the risk of long-term skin damage, especially in the intense midday sun. With a BSk climate that boasts significant UV exposure, particularly around noon when the index peaks at 10, residents and visitors alike should take precautions. Armed with this knowledge, you can enjoy the sunny days while safeguarding your skin's health.
At sunrise, the UV Index starts off mild at 1 by 7:00 AM, gradually climbing to a moderate 3 by 8:00 AM. As the sun rises higher in the sky, the UV radiation intensifies, peaking at an impressive 10 between 12:00 PM and 1:00 PM. This is when sun safety becomes crucial—protect your skin! After this peak, the index begins to decline, tapering to 8 at 3:00 PM and 5 by 4:00 PM. As evening approaches, the radiation eases further, landing at 2 by 6:00 PM and dropping back to a low 1 by 7:00 PM. Stay vigilant during the peak hours to enjoy the sun safely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 6 | 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, seasonal fluctuations in UV index significantly impact sun exposure risk. The high-risk months for UV exposure are from April to August, when the index reaches a peak of 10, indicating a very high risk level and a quick burn time of just 15 minutes. Notably, March also poses risk with a high index of 6. Conversely, the winter months of January and December present a low risk, where outdoor activities allow for 45-minute burn times. Visitors and residents are advised to take precautionary measures during high UV months by wearing sunscreen, protective clothing, and sunglasses, especially between April and August, to minimize 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 |
| 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 |
| Ulaantolgoy | 2 | 4 | 6 | 8 | 10 | 10 | 10 | 10 | 7 | 5 | 3 | 2 |