UV Index in Trenton, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Trenton, United States, where sunny days can bring unexpected risks to skin health. As UV levels can soar to a peak of 11 during midday hours, being aware of these fluctuations is essential for preventing sunburn and long-term skin damage. With Trenton's Cfa climate, characterized by hot summers, the potential for high UV exposure increases significantly. By keeping a close eye on the UV Index, you can enjoy the outdoors while protecting yourself from harmful rays—because a little awareness goes a long way in safeguarding your skin!

Hourly UV Index in Trenton

The UV Index for the day showcases a significant rise in solar intensity as the sun climbs higher in the sky. Starting at a low of 1 at 07:00 and 08:00, the index escalates to 2 by 09:00. A marked increase occurs between 10:00 and 12:00, where it jumps to 4 and peaks at a striking 9 at noon. The afternoon witnesses even higher levels, reaching a maximum of 11 at both 13:00 and 14:00, signifying a critical time for sun protection. As the sun begins to set, the index gradually declines to 5 at 17:00, and eventually returns to a safe 1 by 19:00. It’s essential to take precautions during those peak hours to safeguard against harmful UV exposure!

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	2	low	45 min
10:00	4	moderate	30 min
11:00	7	high	25 min
12:00	9	very high	15 min
13:00	11	extreme	10 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	1	low	45 min

Monthly UV Index Trends in Trenton

Throughout the year, the UV Index fluctuates significantly, indicating varying levels of sun exposure risk. The highest risk months are from May to August, when the UV Index peaks at an extreme level of 11, allowing for a burn time of just 10 minutes. Notably, March and April also present high risks with indices reaching 8 and 10, respectively. Conversely, the winter months of January and December have a moderate UV Index of 4, with longer burn times of 30 minutes. To protect yourself during high UV months, it is essential for both visitors and residents to apply sunscreen regularly, wear protective clothing, and seek shade during peak sun hours, particularly from late spring through summer.

Monthly Maximum UV Index for Trenton, United States

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

The table above highlights how UV exposure in Trenton 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.

Trenton'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
Trenton	4	6	8	10	11	11	11	11	9	7	6	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5