UV Index in Evanston, United States

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents of Evanston, United States, especially during the peak hours of sunlight. As the UV Index can soar to 11 between noon and 1 PM, being aware of UV levels is essential for preventing sunburn and protecting skin health. The Dfb climate zone in Evanston brings about varying UV exposure risks throughout the year, making it vital to stay informed about daily fluctuations. By keeping an eye on the UV Index, you can enjoy the outdoors while safeguarding your skin against harmful radiation.

Hourly UV Index in Evanston

The UV Index dramatically peaks during the midday hours, showcasing a clear pattern of solar intensity. Starting from a mild 1 at 07:00, it steadily rises, reaching a notable 11 by 13:00. This peak signifies a high risk for skin damage, urging sun safety precautions. As the afternoon progresses, the index gradually declines—falling to 9 at 15:00, and decreasing further to 2 by 18:00. With the sun's intensity waning, the cooler evening hours promise a gentle close to the day, offering a more comfortable outdoor experience. Always stay vigilant during peak UV times!

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	11	extreme	10 min
14:00	10	very high	15 min
15:00	9	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 Evanston

Throughout the year, the UV Index exhibits significant seasonal changes that greatly influence the risk of over-exposure. High-risk months are predominantly from March to August, peaking in May and June with an extreme UV Index of 11 and 12, respectively, where the burn time is as short as 10 minutes. As spring transitions into summer, the exposure category shifts from very high to extreme, indicating that visitors and residents should exercise caution during outdoor activities, particularly between 11 AM and 3 PM when UV radiation is most intense. In contrast, months like January, February, November, and December present a lower risk, categorized as moderate, with longer burn times of 30 minutes. It's crucial for everyone to remain vigilant, wearing protective clothing, applying sunscreen, and seeking shade during peak UV hours, especially during the high-risk summer months.

Monthly Maximum UV Index for Evanston, United States

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

The table above highlights how UV exposure in Evanston 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.

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