UV Index in Ulan Bator, Mongolia

Last updated: June 2, 2025

In Ulan Bator, Mongolia, awareness of the UV Index is crucial for safeguarding your skin and overall health. Understanding UV levels helps you prevent sunburn and long-term skin damage, allowing you to enjoy the beautiful outdoors without worry. The city experiences a BSk climate, characterized by intense sunlight and fluctuating UV exposure throughout the day. With UV Index levels peaking at 9 around noon, it’s essential to be mindful of the risks and take appropriate protective measures to keep your skin healthy and radiant.

Hourly UV Index in Ulan Bator

The UV Index today presents a notable climb as the sun ascends, peaking at 9 around noon and early afternoon, signaling very high sun exposure risk. Starting gently at 1 by 7 AM, the index rises steadily, reaching 6 by 10 AM and then surging to its maximum of 9 between 12 PM and 1 PM. Early afternoon brings a slight decline to 8 at 2 PM, followed by a gradual decrease through the later hours, settling back to 1 by 7 PM. With this trajectory, it's crucial to take precautions during the peak hours of 11 AM to 1 PM, ensuring skin protection against harmful UV rays. Stay safe and enjoy the sun wisely!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
TimeUVICategoryTime to Burn
07:001low45 min
08:002low45 min
09:004moderate30 min
10:006high25 min
11:008very high15 min
12:009very high15 min
13:009very high15 min
14:008very high15 min
15:007high25 min
16:005moderate30 min
17:003moderate30 min
18:002low45 min
19:001low45 min

Monthly UV Index Trends in Ulan Bator

The UV Index experiences significant seasonal fluctuations, with high-risk months identified as May through August, when the UV Index reaches a peak of 9, categorizing it as very high and resulting in a burn time of just 15 minutes. As the year progresses, the UV exposure starts low in January (Index 2) and gradually increases, peaking during the summer months before tapering off. Visitors and residents are advised to take extra precautions during the high-risk months by wearing protective clothing, applying broad-spectrum sunscreen frequently, and seeking shade, especially during midday hours. Starting in September, the risk decreases but remains moderately high, so vigilance is still necessary until the UV Index drops further in late autumn and winter.

Monthly Maximum UV Index for Ulan Bator, Mongolia

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Ulan Bator. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec235799996431
Data source: Statistical UV Index data for Ulan Bator, based on information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

Compare Ulan Bator UV Index with Other Mongolia Cities

The table above highlights how UV exposure in Ulan Bator compares to other major locations across Mongolia. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Ulan Bator's solar exposure compared to other cities in Mongolia. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Darhan UVI135689986421
Erdenet UVI235789986421
Ulan Bator235799996431
OElgii UVI2357109997521
Khovd UVI23671010997521