UV Index in Bozeman, United States

Last updated: August 1, 2025

In Bozeman, United States, being aware of the UV Index is essential for safeguarding your skin and overall health. Understanding UV levels is crucial not just for preventing painful sunburns but also for reducing long-term skin damage. Bozeman's Dfb climate brings sunny days with varying UV exposure risks—peaking at 10 during midday—making it vital to monitor UV levels regularly. By staying informed, you can enjoy the beautiful Montana outdoors while protecting your skin from harmful effects.

Hourly UV Index in Bozeman

As the sun rises, the UV Index begins its steady ascent, starting at a mild 1 at 7:00 AM. By 8:00 AM, it reaches 2, hinting at the day ahead. As we approach mid-morning, the intensity climbs to 3 by 9:00 AM and then dramatically spikes to 5 at 10:00 AM. The real peak occurs between 12:00 PM and 2:00 PM, where the index soars to a whopping 10, indicating strong sun exposure. This midday intensity begins to taper off by 3:00 PM, as it drops to 9, and continues to slide through the late afternoon, ending the day at 1 by 7:00 PM. It's crucial to stay protected during those peak hours to enjoy the sun safely!

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
08:001low45 min
09:003moderate30 min
10:004moderate30 min
11:007high25 min
12:009very high15 min
13:0010very high15 min
14:0010very high15 min
15:008very high15 min
16:006high25 min
17:004moderate30 min
18:002low45 min
19:001low45 min

Monthly UV Index Trends in Bozeman

Throughout the year, UV Index levels fluctuate significantly, indicating varying levels of sun exposure risk. January and February have moderate UV levels (3 and 5, respectively), while March sees a rise to high levels (7), marking the beginning of increased sun exposure. The danger escalates quickly in April (UV Index 8) and peaks in May and June (both at UV Index 11), categorized as extreme, necessitating precautions as burn times drop to just 10 minutes. July and August follow closely with very high levels (10), and September remains a high-risk month at 8. As the year progresses, October sees a decrease to high (6), November returns to moderate (4), and December drops to low exposure (2). **Visitors and residents are advised to take extra precautions during the high-risk months of April through September, including wearing protective clothing, using sunscreen, and seeking shade during peak hours to reduce harm from UV exposure.

Monthly Maximum UV Index for Bozeman, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Bozeman. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec3578111110108632
Data source: Statistical UV Index data for Bozeman, 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 Bozeman UV Index with Other United States Cities

The table above highlights how UV exposure in Bozeman 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.
Bozeman's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Chicago UVI34689101098642
Brooklyn UVI35681010998642
New York City UVI35681010998642
Bozeman3578111110108642
Los Angeles UVI46891011111010754
Houston UVI589111112121110975