UV Index in Darby, United States

Last updated: July 2, 2025

Awareness of the UV Index is crucial for residents of Darby, United States, as it serves as a vital tool in protecting your skin from harmful ultraviolet radiation. Understanding UV levels is essential not only for preventing painful sunburns but also for maintaining long-term skin health. Situated in a Dfb climate zone, Darby experiences significant UV exposure, especially during peak hours, where the index can soar to levels of 11 around midday. By keeping an eye on the UV Index, you can enjoy the outdoors safely while minimizing your risk of skin damage.

Hourly UV Index in Darby

At dawn, the UV Index starts off low at 1 around 7:00 AM, gradually rising to 3 by 9:00 AM. As the sun reaches its peak, the intensity surges, hitting a notable 7 at 11:00 AM and maximizing at a blistering 11 by 2:00 PM. The highest reading occurs at 1:00 PM with a peak of 10, signaling the need for sun protection. As the afternoon wears on, the UV levels begin to decline, dropping to 5 by 5:00 PM and easing to 2 at 7:00 PM. Throughout the day, it's clear that vigilance against UV exposure is crucial, especially during the midday hours when protection is most needed.

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	7	high	25 min
12:00	9	very high	15 min
13:00	10	very high	15 min
14:00	11	extreme	10 min
15:00	10	very high	15 min
16:00	8	very high	15 min
17:00	5	moderate	30 min
18:00	3	moderate	30 min
19:00	2	low	45 min

Monthly UV Index Trends in Darby

Seasonal trends in UV exposure indicate a marked increase from January to July, with the highest risk months for UV exposure being May, June, and July, when the UV Index peaks at 11, categorizing it as extreme with a burn time of only 10 minutes. As summer fades into early autumn, the UV Index begins to decline, dropping to a more moderate 5 in October and further decreasing to 3 in November, and 2 in December, which suggests a safer environment for outdoor activities during these months. Residents and visitors should take precautionary measures during the high-risk months by seeking shade, wearing protective clothing, and applying sunscreen regularly, especially in the peak hours of sunlight, to prevent sunburn and long-term skin damage.

Monthly Maximum UV Index for Darby, United States

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

The table above highlights how UV exposure in Darby 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.

Darby'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
Darby	3	4	7	8	11	11	11	9	8	5	3	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