Last updated: July 2, 2025
Understanding the UV Index in Grand Isle, United States, is crucial for safeguarding your skin and overall health under the sun. With the local Cfa climate, residents and visitors alike face significant UV exposure, especially during midday when levels peak at a high of 12, indicating a risk of harm from unprotected sun exposure. Being aware of these UV levels can aid in sunburn prevention and promote long-term skin health. So whether you’re lounging at the beach or enjoying outdoor activities, knowing the UV Index empowers you to take the necessary precautions to protect yourself from the sun's harmful rays.
Throughout the day, the UV Index displayed a dynamic pattern, peaking at an intense 12 around 1 PM. Starting off gently at 1 by 7 AM, it climbed steadily, reaching 9 by 11 AM, a clear sign to take precautions. As the sun approached its zenith, the index swelled to its maximum at 12 PM, emphasizing the importance of sun safety. Following the midday peak, the index gradually decreased, dropping to 9 by 3 PM, then tapering off further to 2 by 6 PM and 1 by 7 PM. This data underscores the significance of shielding oneself from the sun's harmful rays during the day, especially when the UV Index is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | 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 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV levels fluctuate significantly, with high-risk months primarily from February to September. During these months, the UV Index reaches very high to extreme levels, particularly in April, May, June, July, August, and September, where the Index consistently stands at 11 or 12 and the recommended burn time is as low as 10 minutes. February, March, October, and November present a slightly lower risk, but still require caution, especially with UV ratings of 8 to 9. Residents and visitors should prioritize sun safety by seeking shade, wearing protective clothing, and applying sunscreen during peak hours to mitigate the risk of skin damage. Remember, even on cooler days, UV exposure can be significant, so staying vigilant year-round is key.
UV Risk Categories
| 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 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |
| Grand Isle | 5 | 8 | 9 | 11 | 11 | 11 | 12 | 12 | 11 | 9 | 7 | 5 |