UV Index in Charlotte Amalie, Virgin Islands (U.S.)

Last updated: August 1, 2025

In Charlotte Amalie, Virgin Islands (U.S.), awareness of the UV Index is essential for everyone who enjoys the vibrant outdoor lifestyle this tropical paradise offers. Understanding UV levels is crucial for preventing sunburn and maintaining long-term skin health, especially in a climate that fosters intense sunlight. With UV Index values peaking at 12 around midday, residents and visitors alike should take precautions to protect themselves during these hours of maximum exposure. Familiarizing yourself with the UV Index can mean the difference between a fun day under the sun and harmful skin damage. Stay informed to enjoy the beauty of Charlotte Amalie safely!

Hourly UV Index in Charlotte Amalie

The UV Index throughout the day showcases a dynamic dance of sun intensity. Starting at a mild 1 at 07:00, the index gradually rises, hitting 3 by 08:00. As the morning progresses, it peaks at a striking 12 between 12:00 and 13:00, indicating the strongest sun exposure—perfect for a beach day but not without caution! By 15:00, the UV levels begin to retreat, dropping to 7, and continue to fall, reaching 2 by 17:00. As the sun sets, the index dwindles further to 0 by 19:00, signifying a gentle end to the day. Remember to stay protected 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	5	moderate	30 min
10:00	9	very high	15 min
11:00	12	extreme	10 min
12:00	13	extreme	10 min
13:00	13	extreme	10 min
14:00	10	very high	15 min
15:00	7	high	25 min
16:00	4	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Charlotte Amalie

Throughout the year, UV exposure varies significantly, with the highest risk months occurring from February to September, where the UV Index often reaches extreme levels of 11 to 14. March, April, May, and August consistently show an Index of 13, while September peaks at 14, necessitating vigilant sun protection. During these high-risk months, the burn time is as short as 10 minutes, emphasizing the importance of wearing sunscreen, protective clothing, and seeking shade. As the seasons transition, January, November, and December see a decrease in UV levels, but caution should still be practiced during the very high exposure periods, especially before noon. Visitors and residents are strongly advised to remain vigilant and take appropriate sun safety measures to protect their skin year-round.

Monthly Maximum UV Index for Charlotte Amalie, Virgin Islands (U.S.)

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Charlotte Amalie. 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 Charlotte Amalie, 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 Charlotte Amalie UV Index with Other Virgin Islands (U.S.) Cities

The table above highlights how UV exposure in Charlotte Amalie compares to other major locations across Virgin Islands (U.S.). This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Charlotte Amalie's solar exposure compared to other cities in Virgin Islands (U.S.). Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Charlotte Amalie	9	11	13	13	13	13	12	13	14	12	9	8
Cruz Bay UVI	9	11	13	13	13	13	13	13	14	12	9	8
Saint Croix UVI	9	11	13	13	13	13	13	13	14	12	10	9