UV Index in Black Rock, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Black Rock, United States, where sunny days are common and the potential for overexposure to ultraviolet rays is significant. With peak UV levels reaching 11 around midday, being aware of these fluctuations can help you prevent sunburn and promote long-term skin health. In this Cfa climate zone, where warm summers and varying cloud cover contribute to increased UV exposure, it's essential to stay informed about daily UV levels and take appropriate protective measures. Embrace the sun wisely and safeguard your skin!

Hourly UV Index in Black Rock

As the sun rises, the UV Index starts off gently at 1 by 7:00 AM, gradually climbing as the day progresses. By 10:00 AM, it reaches 6, signaling a notable increase in solar radiation. The intensity peaks at 12:00 PM with a striking 10 and continues to soar to a maximum of 11 at 1:00 PM, marking the hour of greatest exposure. As the afternoon unfolds, the index begins to taper off—dropping to 10 at 2:00 PM and 8 by 3:00 PM. By late afternoon, the UV Index gracefully descends to 4 at 5:00 PM, settling back to 2 by 6:00 PM and finally returning to a gentle 1 by 7:00 PM. This highlights the importance of sun protection during mid-day when UV rays are at their most intense.

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	6	high	25 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	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 Black Rock

Throughout the year, UV Index levels fluctuate significantly, with the highest values occurring in the summer months. Notably, June and July reach an extreme UV Index of 11, where burn time is reduced to just 10 minutes. The risk remains high in March through August, characterized by very high UV levels (8 to 10) and quick burn times ranging from 15 to 25 minutes. Conversely, the winter months of January, November, and December see moderate UV levels (3 to 5) with burn times extending to 30 minutes. Visitors and residents should take precautions, especially between March and August, by seeking shade, wearing protective clothing, and applying sunscreen regularly to mitigate the risk of skin damage.

Monthly Maximum UV Index for Black Rock, United States

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

The table above highlights how UV exposure in Black Rock 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.

Black Rock'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
Black Rock	3	6	8	10	10	11	11	10	9	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