UV Index in Los Alamos, United States

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors of Los Alamos, United States, where the unique Csb climate can lead to varying levels of sun exposure throughout the day. With peak UV levels reaching as high as 11 around noon, awareness of these numbers is essential to prevent sunburn and protect skin health. By grasping the significance of UV levels, you can make informed decisions about sun safety and enjoy the beautiful outdoors while minimizing risks. Whether it's a quick stroll or a full day outside, knowing the UV Index can help you safeguard your skin against overexposure in this picturesque and sunny locale.

Hourly UV Index in Los Alamos

The UV Index today paints a vivid picture of solar intensity, peaking dramatically between 12:00 PM and 2:00 PM with a striking 11—a warning to seek shade and protect skin. Starting the day at a gentle 1 at 7:00 AM, the index gradually climbs, reaching 4 by 9:00 AM and escalating to 9 by 11:00 AM. As the sun reaches its zenith, the index hits 11, indicating extreme conditions that persist for a solid three hours. Following this midday blast, it gracefully declines to 6 by 4:00 PM, before tapering off to a safer 1 by the evening. Remember to stay sun-smart 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	6	high	25 min
11:00	9	very high	15 min
12:00	11	extreme	10 min
13:00	11	extreme	10 min
14:00	11	extreme	10 min
15:00	9	very high	15 min
16:00	6	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 Los Alamos

Throughout the year, the UV Index experiences significant seasonal changes, indicating varying levels of sun exposure risk. The high-risk months are from March to August, where the index reaches very high to extreme levels, peaking at 12 in July. During this time, burn times are dangerously short, ranging from 10 to 15 minutes. As such, visitors and residents are advised to take precautionary measures, including wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade during peak sunlight hours. In contrast, the winter months (December through February) see lower UV levels, with a moderate risk indicated by indices from 3 to 6, allowing for safer outdoor activities, though caution is still recommended.

Monthly Maximum UV Index for Los Alamos, United States

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

The table above highlights how UV exposure in Los Alamos 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.

Los Alamos'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
Los Alamos	4	6	8	10	11	11	12	11	10	7	5	3
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5