UV Index in Sullivans Island, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors of Sullivans Island, United States, where sunny days beckon beachgoers and outdoor enthusiasts alike. Awareness of UV levels plays a vital role in preventing sunburn and protecting skin health, especially during peak hours when UV rays can reach dangerously high levels. With Sullivans Island’s Cfa climate, characterized by warm summers and moderate winters, the risk of overexposure to UV radiation is significant, particularly between 10 AM and 2 PM when the UV Index can soar to an intense 12. Prioritizing UV awareness not only enhances your outdoor experience but also safeguards your long-term skin health.

Hourly UV Index in Sullivans Island

As the day unfolds, the UV Index begins low in the morning, peaking sharply around 12:00 PM with a striking 11. From there, it maintains a high level, reaching a maximum of 12 at 1:00 PM, before gradually falling as the afternoon progresses. By 3:00 PM, it dips to 9, signaling a decline in intensity. As evening approaches, the index returns to a more manageable 2 by 6:00 PM, ultimately settling at 1 as the sun sets. Remember to protect your skin, especially during those peak hours when the UV intensity reaches its highest levels!

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	3	moderate	30 min
10:00	5	moderate	30 min
11:00	8	very high	15 min
12:00	11	extreme	10 min
13:00	12	extreme	10 min
14:00	11	extreme	10 min
15:00	9	very high	15 min
16:00	7	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 Sullivans Island

As the seasons change, so do UV levels, with significant increases from February to August. Notably, March to August are high-risk months, peaking in July with a UV Index of 12, categorized as extreme and a burn time of only 10 minutes. Visitors and residents should exercise increased caution during these months, seeking shade, wearing protective clothing, and applying sunscreen regularly. In contrast, winter months like January and December see a moderate UV Index of 4, allowing for more relaxed outdoor activities. However, November still poses a high risk with a UV Index of 6, reminding all to remain vigilant regardless of the season.

Monthly Maximum UV Index for Sullivans Island, United States

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

The table above highlights how UV exposure in Sullivans Island 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.

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