UV Index in South Bay, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of South Bay, United States, where the sunny climate can lead to significant sun exposure. Being aware of UV levels is essential not only for preventing sunburn but also for promoting overall skin health. During peak hours, especially between noon and 2 PM, the UV Index can soar to levels as high as 12, indicating a very high risk of harm from unprotected sun exposure. With this in mind, it's important to take precautions against the heightened UV exposure risks in our region, ensuring you enjoy the sun safely while protecting your skin.

Hourly UV Index in South Bay

As the sun rises, the UV Index starts off low at a manageable 1 from 07:00 to 08:00. However, things heat up quickly as we move into the late morning; by 10:00, it spikes to 5, reaching 8 at 11:00. The peak intensity occurs at 12:00, with an impressive index of 11, closely followed by 12 at 13:00 and 14:00—the sun is at its strongest! A gradual decrease follows, dropping to 10 by 15:00 and continuing down to 4 at 17:00. As the day winds down, the index relaxes further to 2 at 18:00 and returns to a safe 1 by 19:00. It's clear that today's UV risk peaks around midday, so remember to stay protected during those exposed 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	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	11	extreme	10 min
13:00	12	extreme	10 min
14:00	12	extreme	10 min
15:00	10	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 South Bay

The UV Index reflects notable seasonal changes, with the highest levels occurring from March to September, where values frequently reach the extreme category of 10 to 12. February marks the beginning of very high UV levels, with risks peaking in April through August. Notably, April through September poses the greatest risk, featuring 10 minutes of potential burn time under maximum sun exposure. Individuals are advised to take precautions during these high-risk months by seeking shade, wearing protective clothing, and applying sunscreen regularly. Conversely, November and December provide more moderate levels of exposure, allowing for longer burn times of 25 to 30 minutes, but individuals should remain mindful during all months, as UV rays can still cause damage.

Monthly Maximum UV Index for South Bay, United States

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

The table above highlights how UV exposure in South Bay 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.

South Bay'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
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5
South Bay	6	9	10	12	11	12	12	12	11	10	7	5