UV Index in Billings, United States

Last updated: June 2, 2025

In Billings, Montana, understanding the UV Index is crucial for protecting your skin from harmful ultraviolet radiation. With levels peaking at a dangerous 11 around midday, being aware of UV levels is essential to prevent sunburn and maintain long-term skin health. The semi-arid BSk climate of Billings brings ample sunshine, which, while enjoyable, also increases the risk of overexposure. By checking the UV Index daily, residents can take proactive measures to safeguard their skin, ensuring that their outdoor activities remain safe and enjoyable.

Hourly UV Index in Billings

As the day unfolds, the UV Index rises steadily, peaking at 11 around 1 PM—a clear signal for sun protection. Starting from a low of just 1 at 7 AM, it escalates through the morning, hitting 8 by 11 AM. At 12 PM, the intensity reaches a significant 10, before slightly diminishing to 9 at 3 PM and tapering off rapidly in the afternoon. As the sun begins to set, the UV levels drop to 4 by 5 PM, finally settling back to 1 by 7 PM. With this clear UV trajectory, staying cautious during the peak hours, especially from 11 AM to 2 PM, is essential for skin safety. Don your sunscreen and enjoy the sun responsibly!

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
12:0010very high15 min
13:0011extreme10 min
14:0010very high15 min
15:009very high15 min
16:006high25 min
17:004moderate30 min
18:002low45 min
19:001low45 min

Monthly UV Index Trends in Billings

Throughout the year, the UV Index exhibits notable seasonal variations, with high-risk months primarily occurring from March to September. During this period, particularly in June with an extreme UV Index of 11 and April to August, which consistently sees values between 8 and 10, individuals are at increased risk of sunburn with burn times decreasing to as little as 10 minutes. Conversely, the winter months of December and January reflect a lower UV Index, ranging from 2 to 3, providing a safer environment for sun exposure with burn times extending up to 45 minutes. It is advisable for visitors and residents to take protective measures during the high-risk months, including wearing sunscreen, protective clothing, and seeking shade, especially during peak sun hours.

Monthly Maximum UV Index for Billings, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Billings. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098532
Data source: Statistical UV Index data for Billings, 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 Billings UV Index with Other United States Cities

The table above highlights how UV exposure in Billings compares to other major locations across United States. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Billings's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Chicago UVI34689101098642
Billings35689111098532
Brooklyn UVI35681010998642
New York City UVI35681010998642
Los Angeles UVI46891011111010754
Houston UVI589111112121110975