Last updated: June 2, 2025
Understanding the UV Index is essential for residents and visitors in Saint Croix, U.S. Virgin Islands. With the island's tropical climate, the potential for high UV exposure can pose significant risks to skin health, including sunburn and long-term damage. By being aware of daily UV levels, you can better protect yourself and your loved ones from harmful rays. During peak hours, especially around noon when the UV Index can soar to 13, it's crucial to take preventive measures. Stay informed, enjoy the sunshine safely, and embrace the beautiful Caribbean lifestyle while safeguarding your skin!
The UV Index showcases a dynamic increase throughout the day, peaking at 13 around 12:00 PM. Starting from a gentle 1 at 7:00 AM, the index steadily climbs as the sun ascends, reaching 6 by 9:00 AM. The intensity becomes palpable by 11:00 AM with a sharp rise to 12, before hitting its zenith at 13 at noon, prompting caution for outdoor activities. As the afternoon unfolds, the levels begin to decline, dipping to 10 by 2:00 PM and gradually falling to 0 by 7:00 PM, signaling safer conditions for evening strolls. It’s essential to stay protected during the midday hours when the sun's rays are most intense!
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 | 12 | 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 |
Seasonal UV changes indicate that UV exposure peaks significantly from March through October, where the UV Index consistently reaches extreme levels of 13 or higher, particularly in September with a peak index of 14. During these high-risk months, the recommended burn time is as low as 10 minutes, highlighting the urgent need for sun protection. Both visitors and residents should take precautions by wearing broad-spectrum sunscreen, protective clothing, and seeking shade, especially between 11 AM and 4 PM, when the sun’s rays are the strongest. In January, November, and December, while UV levels drop to the very high category, it's still advisable to remain vigilant about skin protection.
UV Risk Categories
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 UVI | 9 | 11 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 12 | 9 | 8 |
Saint Croix | 9 | 11 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 12 | 10 | 9 |