UV Index in Derby Line, United States

Last updated: July 2, 2025

In Derby Line, United States, being aware of the UV Index is essential for protecting your skin and health. Understanding the daily UV levels is crucial for preventing sunburn and long-term skin damage, especially as the region experiences significant sunshine during summer months. With its Dfb climate, Derby Line faces varying UV exposure risks throughout the day, peaking at a notable level of 9 around 1:00 PM. Stay informed and enjoy the outdoors safely by checking the UV Index regularly—your skin will thank you!

Hourly UV Index in Derby Line

Throughout the day, the UV Index displays a dynamic progression that's crucial for sun safety. Starting at a low 1 at 7:00 AM, it gradually ascends, reaching 2 by 8:00 AM. As the sun climbs higher, the index peaks at 9 by 1:00 PM, marking the time for heightened caution. From this zenith, it gradually declines: 8 at 2:00 PM, down to 6 by 3:00 PM, and further softening to 3 by 5:00 PM. By evening, the index settles back at 2 at 6:00 PM, and finally returns to 1 as the sun sets at 7:00 PM. It's imperative to protect your skin during the peak hours, especially from 10:00 AM to 2:00 PM, when the UV rays are 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	4	moderate	30 min
10:00	6	high	25 min
11:00	7	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	6	high	25 min
16:00	4	moderate	30 min
17:00	3	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Derby Line

Throughout the year, UV exposure varies significantly, with the highest risk occurring during the summer months of May through August. During this period, the UV Index reaches a peak of 9, classified as very high, with a minimal burn time of just 15 minutes. Conversely, the UV Index is at its lowest in January and December at 2, indicating a low risk of harm from sun exposure, allowing for a burn time of 45 minutes. April and September mark transitional months where the UV Index is high at 7, prompting caution with a burn time of 25 minutes. To protect against harmful UV radiation, it is crucial for both visitors and residents to take appropriate precautions, particularly from May to August, such as wearing sunscreen, protective clothing, and seeking shade during peak sun hours.

Monthly Maximum UV Index for Derby Line, United States

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

The table above highlights how UV exposure in Derby Line 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.

Derby Line'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
Derby Line	2	4	5	7	9	9	9	8	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