UV Index in Penobscot, United States

Last updated: July 2, 2025

Understanding the UV Index in Penobscot, Maine is crucial for protecting your skin and overall health. With UV levels peaking during the midday hours, awareness of these measurements helps residents prevent sunburn and long-term skin damage. The temperate climate of Penobscot, categorized as Dfb, presents unique challenges as it exposes individuals to varying UV radiation levels throughout the year. By staying informed about the local UV Index, you can enjoy the beautiful outdoors while ensuring your skin remains safe from harmful rays.

Hourly UV Index in Penobscot

The hourly UV Index reveals a gradual rise throughout the morning, starting at a mild 1 at 7:00 AM, then doubling to 2 by 8:00 AM. As the day progresses, the sun’s intensity peaks with a notable 9 at 1:00 PM, providing optimal conditions for sun-seekers. The UV Index holds steady at 8 from 11:00 AM to 1:00 PM, indicating a high risk for unprotected skin. Post-peak, the intensity wanes, dropping back to 6 by 3:00 PM and further declining to 1 by 6:00 PM, signaling a shift toward safer levels as evening approaches. Be sure to protect your skin during those peak 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	2	low	45 min
09:00	4	moderate	30 min
10:00	6	high	25 min
11:00	8	very high	15 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	2	low	45 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Penobscot

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 Penobscot, United States

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

The table above highlights how UV exposure in Penobscot 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.

Penobscot'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
Penobscot	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