UV Index in Mount Crested Butte, United States

Last updated: July 2, 2025

Understanding the UV Index in Mount Crested Butte is vital for protecting your skin and overall health, especially in this picturesque mountain town known for its breathtaking landscapes and outdoor activities. With typical UV exposure peaking during the midday sun, awareness of UV levels can help you minimize risks such as sunburn and long-term skin damage. Given Mount Crested Butte's cool mountain climate (Dfc zone), it’s easy to underestimate the sun's intensity, but the UV Index can soar to dangerous levels—reaching as high as 13 in the early afternoon. Stay informed and take precautions to enjoy the sun safely as you explore the stunning trails and slopes of this beautiful area.

Hourly UV Index in Mount Crested Butte

As the sun rises, the UV Index begins its climb, starting at a modest 1 at 07:00. By 09:00, it reaches 4, signaling the need for sun protection. The intensity peaks at 13 around 13:00, perfect for seeking shade or slathering on sunscreen. Temperatures are sizzling as it slightly dips to 12 by 14:00, then gradually decreases throughout the afternoon. As the day winds down, the UV Index falls to 2 at 18:00 and returns to 1 by 19:00, signaling safer conditions as the sun sets. Keep your skin protected during those peak hours when the UV rays are most intense!

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.
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	7	high	25 min
11:00	10	very high	15 min
12:00	12	extreme	10 min
13:00	13	extreme	10 min
14:00	12	extreme	10 min
15:00	10	very high	15 min
16:00	7	high	25 min
17:00	5	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Mount Crested Butte

The UV Index displays significant seasonal changes, with high-risk months typically occurring from March to August, where exposure categories peak at very high to extreme levels. During this period, especially in April and June with UV Index values reaching 12 and 14, outdoor enthusiasts should exercise caution, as the burn time reduces to just 10 minutes. Conversely, from September to November, the UV Index gradually declines, entering moderate levels by December. Residents and visitors are advised to take protective measures during the high-risk months, including wearing sunscreen, protective clothing, and seeking shade during peak sun hours to minimize health risks associated with UV exposure.

Monthly Maximum UV Index for Mount Crested Butte, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Mount Crested Butte. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Mount Crested Butte, 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 Mount Crested Butte UV Index with Other United States Cities

The table above highlights how UV exposure in Mount Crested Butte 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.

Mount Crested Butte's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Chicago UVI	3	4	6	8	9	10	10	9	8	6	4	2
Brooklyn UVI	3	5	6	8	10	10	9	9	8	6	4	2
New York City UVI	3	5	6	8	10	10	9	9	8	6	4	2
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5
Mount Crested Butte	4	6	9	12	13	14	13	12	10	7	5	4