UV Index in Clayton, United States

Last updated: July 2, 2025

In Clayton, United States, awareness of the UV Index is critical for protecting yourself against harmful ultraviolet radiation. Understanding UV levels is essential not only for preventing sunburn but also for promoting long-term skin health. With Clayton's climate characterized as Cfa, residents and visitors face unique exposure risks, especially during the peak UV hours around noon where the index can soar to as high as 11. Staying informed about the UV Index allows you to take the necessary precautions to enjoy the sun safely!

Hourly UV Index in Clayton

The UV Index for the day showcases a striking pattern, starting moderate at 7:00 AM with a value of 1. As the sun climbs higher, the index steadily rises, hitting 3 by 9:00 AM, and then surging to a peak of 11 between 1:00 PM and 2:00 PM. This indicates a high risk of harm from unprotected sun exposure during midday. Following the peak, the UV Index gradually declines to 4 by 5:00 PM and further decreases to 1 by 7:00 PM, emphasizing the critical importance of sun protection during the intense midday hours. It’s advisable to seek shade and wear sunscreen if you're outside during the peak period!

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	1	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	11	extreme	10 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 Clayton

Throughout the year, the UV Index exhibits significant seasonal variations that affect sun exposure risks for both visitors and residents. From January to March, the UV Index begins to rise, indicating a transition from moderate levels (UV 4) in January to very high (UV 8) by March. The peak risk occurs from April to July, where the index reaches an alarming extreme level of 11, meaning people can burn in as little as 10 minutes. August and September continue to pose high risks, though slightly reduced at 10, before dropping to moderate by November (UV 5). To protect against skin damage and health risks, it is essential for individuals to practice sun safety measures, especially during the high-risk months of March through October. To minimize exposure, seek shade, wear protective clothing, and apply sunscreen regularly during these periods.

Monthly Maximum UV Index for Clayton, United States

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

The table above highlights how UV exposure in Clayton 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.

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