UV Index in Greenville, United States

Last updated: June 2, 2025

Understanding the UV Index is essential for residents of Greenville, United States, where sunny days can present hidden risks. With the region's Cfa climate, UV levels peak during the midday sun, reaching a maximum index of 11—indicating a very high risk of harm from unprotected sun exposure. Being aware of these levels is crucial not only for preventing painful sunburns but also for safeguarding long-term skin health. As you enjoy the outdoors, keeping an eye on the UV Index will help you take the necessary precautions to embrace Greenville's beautiful weather while minimizing your risk of skin damage.

Hourly UV Index in Greenville

The UV Index for today shows a dramatic rise as the sun ascends into the sky. Starting at a mild 1 by 07:00, the index gradually builds, reaching 3 by 09:00 and peaking at an intense 11 at 13:00—a level where sun protection is crucial. From this pinnacle, the values start to decline, tapering off to 10 at 14:00 and then gradually decreasing through the afternoon and evening, with values of 6 at 16:00 and sliding down to 1 by 19:00. Plan your outdoor activities accordingly, and remember 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	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	11	extreme	10 min
14:00	10	very high	15 min
15:00	9	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 Greenville

Throughout the year, the UV Index experiences significant fluctuations, with the highest values occurring during the summer months of May to July, where it reaches an extreme 11. March and April also see very high readings of 8 and 9, respectively. Visitors and residents should be particularly cautious from February to August, as these months pose a higher risk for UV exposure, especially from March to July. During these high-risk periods, it's crucial to limit sun exposure, use sunscreen, wear protective clothing, and seek shade whenever possible. Conversely, UV levels are lower in January, November, and December, with moderate exposure categories, making sun safety less of a concern during these months. Maintain awareness of local UV Index reports and adjust sun protection accordingly to ensure safety year-round.

Monthly Maximum UV Index for Greenville, United States

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

The table above highlights how UV exposure in Greenville 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.

Greenville'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
Greenville	3	6	8	9	11	11	11	10	9	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