UV Index in Wheaton, United States

Last updated: May 3, 2025

Understanding the UV Index in Wheaton, United States is essential for safeguarding your skin health and preventing sunburn, especially during peak summer months. The UV levels here can soar to a maximum of 9 between noon and 1 PM, indicating significant risks for overexposure. With Wheaton's Dfb climate—characterized by warm summers—it's crucial to be aware of daily UV fluctuations, ensuring you're protected when the sun is at its strongest. By staying informed, you can enjoy outdoor activities while minimizing potential harm from harmful ultraviolet rays.

Hourly UV Index in Wheaton

The UV Index throughout the day showcases a dynamic pattern of intensity. Starting at a mild 1 at 07:00, it gradually escalates as the sun climbs higher. By 10:00, it reaches 5, signaling a noteworthy rise. The peak occurs at 13:00, with a striking 9, indicating a high potential for harm without protection. Following this zenith, the index starts to wane, dropping to 6 by 16:00 and further diminishing to 1 by 19:00. This illustrates a critical window from 10:00 to 14:00 when caution is essential for outdoor enthusiasts looking to enjoy the sun safely.

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	6	high	25 min
12:00	8	very high	15 min
13:00	9	very high	15 min
14:00	8	very high	15 min
15:00	7	high	25 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 Wheaton

Throughout the year, the UV Index exhibits notable seasonal variations that affect sun exposure risks. The highest risk months are May through August, where the UV Index reaches levels between 9 and 10, indicating a very high risk of harm from unprotected sun exposure, with a burn time of only 15 minutes. In contrast, the months of January, October, and November display a moderate risk with UV Index values of 3 to 5, allowing for safer sun exposure with burn times of 30 minutes. Residents and visitors should take necessary precautions during high-risk months by wearing sunscreen, protective clothing, and seeking shade to minimize sun damage. In lower-risk months, while caution is still advised, the urgency is reduced, allowing for more extended outdoor activities without immediate threat.

Monthly Maximum UV Index for Wheaton, United States

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

The table above highlights how UV exposure in Wheaton 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.

Wheaton'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
Wheaton	3	5	6	7	9	10	9	9	7	5	3	2
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