UV Index in Trenton, United States

Last updated: May 3, 2025

Awareness of the UV Index is crucial for residents of Trenton, United States, where sunny days and warm temperatures contribute to elevated UV exposure risks throughout the year. Understanding UV levels is essential for preventing sunburns and promoting long-term skin health, as harmful rays can lead to skin damage even on seemingly mild days. Trenton's BSk climate zone brings fluctuating UV intensity, with peak values reaching up to 10 around midday. Armed with knowledge about the UV Index, you can better safeguard your skin and enjoy the sunshine responsibly.

Hourly UV Index in Trenton

As the sun rises, the UV Index begins its gentle climb, starting at a modest 1 at 7:00 AM and 8:00 AM. By 9:00 AM, it nudges up to a 2, signaling the day is warming up. However, the intensity ramps up dramatically around 10:00 AM, peaking at 9 by 12:00 PM. The highest alert comes at 1:00 PM and 2:00 PM with a striking 10, indicating it’s time to seek shade and protect your skin. As the afternoon unfolds, the index recedes slowly, dropping to 5 by 5:00 PM and settling down to a safe 1 by 7:00 PM. Keep in mind, during peak hours, the sun's rays are most potent—stay safe and enjoy the sunshine wisely!

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	10	very high	15 min
14:00	10	very high	15 min
15:00	9	very high	15 min
16:00	7	high	25 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, UV exposure varies significantly, with high-risk months typically occurring from March to September. During these months, particularly in April through July, the UV index reaches notably high levels, peaking at 11, which indicates extreme exposure risks and a quick burn time of just 10 minutes. As the seasons shift, visitors and residents should be particularly vigilant from May to August, when protective measures such as sunscreen, hats, and seeking shade are essential to prevent skin damage. In contrast, January, November, and December present a moderate UV index of 3-4, allowing for longer burn times of 30 minutes, though sunscreen should still be applied. Staying informed about these UV changes can help ensure safe outdoor activities year-round.

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
Trenton	3	5	7	9	10	11	11	10	9	6	4	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