UV Index in Las Vegas, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Las Vegas, United States, where the sun shines brightly in its arid, desert climate. Being aware of UV levels helps protect against sunburn and long-term skin damage, making it essential for maintaining healthy skin. With UV indices regularly reaching 12 during peak hours, it’s important to know the risks associated with high exposure. Whether you're lounging by the pool or exploring the Strip, staying informed about UV levels can significantly reduce the chances of harmful effects from the sun.

Hourly UV Index in Las Vegas

As the sun climbs higher in the sky, the UV Index undergoes a dramatic shift throughout the day. Starting at a modest 1 by 07:00, it quickly gains momentum, reaching 2 by 08:00. By 09:00, it hits 4, but the real surge begins as we approach midday; at 10:00, it spikes to 7, culminating in a peak of 12 from 12:00 to 14:00. This high level of UV radiation calls for caution, especially for outdoor activities. As the afternoon progresses, the index gradually decreases, dipping to 10 at 15:00, before winding down to 4 by 17:00, and finally retreating to 1 by 19:00 as the day comes to a close. Remember to protect your skin during those peak hours!

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	12	extreme	10 min
14:00	12	extreme	10 min
15:00	10	very high	15 min
16:00	7	high	25 min
17:00	4	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Las Vegas

The UV Index experiences significant seasonal variation, with the highest values occurring from March through September. During this period, particularly in April, May, June, and July, the UV Index reaches extreme levels of 11 to 13, resulting in very short burn times of just 10 minutes. February and October see high to very high levels of UV exposure, necessitating caution with burn times of 25 and 15 minutes, respectively. The months of November, December, and January exhibit moderate UV levels, allowing for longer burn times of 30 minutes. Visitors and residents should prioritize sun safety during high-risk months (March to September) by seeking shade, wearing protective clothing, and applying sunscreen frequently to mitigate skin damage.

Monthly Maximum UV Index for Las Vegas, United States

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

The table above highlights how UV exposure in Las Vegas 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.

Las Vegas'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
Las Vegas	5	7	9	11	12	13	13	12	11	8	5	4