UV Index in Cruz Bay, Virgin Islands (U.S.)

Last updated: June 2, 2025

In Cruz Bay, Virgin Islands, understanding the UV Index is crucial for protecting your skin against harmful ultraviolet rays. High UV levels, particularly between 10 AM and 2 PM, can lead to sunburn and long-term skin health issues, making it essential to stay informed. With its tropical climate, Cruz Bay experiences significant sun exposure, and the UV Index regularly peaks at levels that call for proactive sun safety measures. Stay vigilant, enjoy the sun, but do so wisely to preserve your skin and health during your time in this beautiful paradise!

Hourly UV Index in Cruz Bay

The UV Index throughout the day reveals striking fluctuations, peaking at a blistering 13 at noon. Starting under gentle conditions at 07:00 with a maximum of 1, the UV intensity gradually climbs, hitting 3 by 08:00. As the sun ascends, it reaches 6 at 09:00 and skyrockets to 11 by 11:00, warning sun seekers to take precautions. The pinnacle occurs at 12:00, where a relentless 13 signals the need for protective measures. The index then begins a steady decline, dipping to 12 by 13:00, before descending further to 10 at 14:00, and tapering off to 4 by 16:00. As twilight approaches, the UV levels fall swiftly, reaching a safe 0 by 19:00, reminding us of the sun's fleeting power and the importance of sun safety 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	3	moderate	30 min
09:00	6	high	25 min
10:00	9	very high	15 min
11:00	11	extreme	10 min
12:00	13	extreme	10 min
13:00	12	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 Cruz Bay

Throughout the year, UV index values exhibit notable variability, with high-risk months predominantly occurring from February to October, where the index reaches extremes ranging from 11 to 14. The most intense periods are seen in September with a UV index of 14, alongside March, April, May, June, July, and August, all maintaining high levels of 13. During these months, burn times are reduced to just 10 minutes, emphasizing the need for vigilance in sun protection. Conversely, January, November, and December see a slight decline in risk, with UV indexes of 9 and 8, allowing for burn times of 15 minutes. Visitors and residents are strongly advised to utilize appropriate sun protection strategies, including the use of sunscreen, protective clothing, and seeking shade during peak UV hours to mitigate risks throughout the year.

Monthly Maximum UV Index for Cruz Bay, Virgin Islands (U.S.)

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

The table above highlights how UV exposure in Cruz Bay 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.

Cruz Bay'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 UVI	9	11	13	13	13	13	12	13	14	12	9	8
Cruz Bay	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