UV Index in Vail, United States

Last updated: June 2, 2025

Understanding the UV Index in Vail, United States, is crucial for protecting your skin from harmful ultraviolet rays. With its high elevation and sunny climate, Vail experiences significant UV levels, especially during peak hours when the index can soar to 14. This heightened exposure increases the risk of sunburn and long-term skin health issues, making it vital to stay informed about daily UV levels. Knowing when to seek shade and how to protect yourself can make all the difference in enjoying the breathtaking outdoors while safeguarding your health. Remember, even on cooler days, UV rays can still pose a risk, so keep an eye on the UV Index to ensure you’re prepared for the sun's intensity.

Hourly UV Index in Vail

As the day unfolds, the UV Index rises dramatically, peaking at 14 around 1:00 PM. Starting from a mild 1 at 7:00 AM, it gradually climbs, reaching 11 at 11:00 AM and hitting its zenith with a concerning 13 by 12:00 PM. This intense UV exposure persists until 2:00 PM, when it starts to taper off, declining to 8 by 4:00 PM and eventually returning to safer levels of 2 by 6:00 PM. It's crucial to stay protected during those peak hours, especially between 10:00 AM and 2:00 PM, when the sun's rays are at their strongest.

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	5	moderate	30 min
10:00	8	very high	15 min
11:00	11	extreme	10 min
12:00	13	extreme	10 min
13:00	14	extreme	10 min
14:00	13	extreme	10 min
15:00	11	extreme	10 min
16:00	8	very high	15 min
17:00	5	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Vail

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 Vail, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Vail. 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 Vail, 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 Vail UV Index with Other United States Cities

The table above highlights how UV exposure in Vail 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.

Vail'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
Vail	4	6	9	12	13	14	13	12	10	7	5	4