UV Index in Triangle, United States

Last updated: June 2, 2025

In the Triangle area of the United States, being mindful of the UV Index is crucial for everyone who enjoys the outdoors. Understanding UV levels can significantly impact your health by aiding in sunburn prevention and promoting skin health. This region, characterized by its Cfa climate, often experiences high UV exposure, particularly during midday when levels peak at a significant 10. Awareness of these fluctuations can help you take protective measures and enjoy the sunshine safely!

Hourly UV Index in Triangle

As the day begins, the UV Index gradually climbs, starting at a low 1 at 7:00 AM and reaching peak intensity of 10 between 12:00 PM and 1:00 PM. This is a crucial time when sun protection is essential. Following the peak, the index begins a gradual decline, dropping to 8 at 3:00 PM, then further to 4 by late afternoon at 5:00 PM. As evening approaches, the UV levels taper off to 2 at 6:00 PM and finally return to 1 by 7:00 PM. It’s clear that midday exposure should be approached with caution, while the morning and evening hours provide a gentler UV experience.

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	3	moderate	30 min
10:00	6	high	25 min
11:00	8	very high	15 min
12:00	10	very high	15 min
13:00	10	very high	15 min
14:00	9	very high	15 min
15:00	8	very high	15 min
16:00	6	high	25 min
17:00	4	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Triangle

Throughout the year, the UV Index demonstrates significant seasonal changes, highlighting the need for awareness regarding sun exposure. From January to February, UV levels are moderate (index 3-5), with a burn time of 30 minutes. As spring arrives in March, the index rises to 7, indicating high exposure risk with a reduced burn time of 25 minutes. The peak risk occurs from April through August, where the index reaches its highest levels (9-10) and burn times drop to just 15 minutes, categorizing these months as very high risk. In September and October, the UV index remains significant but decreases to high levels (7-8) with a burn time of 25 minutes. November and December return to moderate levels (index 3-5) with a burn time of 30 minutes. For visitors and residents alike, it is crucial to take protective measures, especially during the high-risk months from April to August, by using sunscreen, wearing protective clothing, and seeking shade during peak sunlight hours.

Monthly Maximum UV Index for Triangle, United States

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

The table above highlights how UV exposure in Triangle 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.

Triangle'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
Triangle	3	5	7	9	10	10	10	9	8	7	5	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