UV Index in Madison, United States

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents of Madison, United States, where sunny days can lead to both beautiful vistas and significant sun exposure. With the UV levels peaking at 10 during midday, knowledge of these indices helps in preventing sunburn and protecting skin health. Madison's Cfa climate presents its own challenges, with warm summers amplifying UV radiation risks. By staying informed about the UV Index, you can enjoy the outdoors while ensuring you and your loved ones are safeguarded against harmful effects of the sun.

Hourly UV Index in Madison

At dawn, 7:00 AM, the UV Index is a mild 1, offering a gentle start to the day. As the sun climbs higher, it steadily rises, reaching 2 by 8:00 AM and hitting 3 at 9:00 AM. However, between 10:00 AM and 1:00 PM, the intensity increases sharply, peaking at an impressive 10 from 12:00 PM to 1:00 PM—the highest level of risk. The UV Index then begins its descent, dropping to 8 at 3:00 PM, followed by a gradual decline to 4 by 5:00 PM. As evening approaches, the index wanes further, settling back down to 1 by 7:00 PM. To enjoy the sunshine while staying safe, make sure to take precautions, especially 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	3	moderate	30 min
10:00	5	moderate	30 min
11:00	8	very high	15 min
12:00	10	very high	15 min
13:00	10	very high	15 min
14:00	10	very high	15 min
15:00	8	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 Madison

Throughout the year, the UV Index demonstrates notable seasonal changes, influencing the risk of sun exposure significantly. High-risk months typically occur from March to September, when the UV Index reaches levels categorized as high (7+) to extreme (11). April through August are particularly critical, with May exhibiting the highest risk at an extreme index of 11, allowing only a 10-minute burn time. Residents and visitors should take precautions during these months, such as wearing protective clothing, utilizing broad-spectrum sunscreen, and seeking shade, especially during peak hours from 10 AM to 4 PM. As the year progresses, UV levels generally decrease, returning to moderate exposure in the fall and winter, where burn times extend to 30 minutes in January and December.

Monthly Maximum UV Index for Madison, United States

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

The table above highlights how UV exposure in Madison 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.

Madison'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
Madison	3	5	7	9	11	10	10	10	8	7	5	3
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