Last updated: June 2, 2025
Understanding the UV Index in Grand Isle, United States, is essential for residents and visitors alike, as it directly impacts skin health and the risk of sunburn. With the area's Dfb climate, characterized by varying seasonal temperatures, UV exposure can fluctuate significantly throughout the day. During peak hours, especially between 10 AM and 2 PM, the UV Index soars to levels 10, indicating a very high risk of harm from unprotected sun exposure. By staying informed about UV levels, you can take proactive measures to protect your skin and enjoy the sun safely in this beautiful coastal retreat.
As the sun rises and the day unfolds, the UV Index reaches its peak around noon, soaring to 10 at 12:00 PM and maintaining intensity until 1:00 PM. Early risers can enjoy moderate exposure with values of 2 at 7:00 AM and gradually increasing to 3 by 8:00 AM. However, the real heat of the day hits at 11:00 AM, where the index climbs to 8, signaling a cautionary alert for sun safety. As afternoon approaches, values dip to 7 at 3:00 PM, then drop further to 5 and 3 in the early evening. By the time the sun sets, the UV Index recedes to a gentle 1 by 7:00 PM, making it a perfect time for a leisurely evening stroll. Stay protected during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, so do UV levels, significantly impacting sun exposure and skin health. January and December show the lowest UV Index (2), indicating low exposure risk with a burn time of 45 minutes. As we move through February and March, the UV Index rises to moderate levels (3-5), reducing burn time to 30 minutes. The high-risk months begin in April, peaking in May and June with UV indices of 7-10 and very high exposure risks, corresponding to a dangerous burn time of just 15 minutes. July and August maintain this high risk, then taper off in September with a drop to a high category (7), allowing for a longer burn time of 25 minutes. By October and November, the exposure risk lessens again to moderate levels, before returning to low in December. Visitors and residents are advised to use adequate sun protection, especially during the high and very high months, to minimize the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grand Isle | 2 | 3 | 5 | 7 | 8 | 10 | 8 | 8 | 7 | 4 | 3 | 2 |
| 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 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |