Last updated: August 1, 2025
Understanding the UV Index is crucial for residents of Marks, United States, especially given its significant role in preventing sunburn and promoting long-term skin health. With a humid subtropical climate (Cfa), Marks often experiences elevated UV exposure, particularly between late morning and early afternoon, where levels can soar to 11. By being aware of daily UV Index fluctuations, you can better protect yourself and your loved ones from harmful solar radiation, ensuring enjoyable outdoor activities while safeguarding your skin from potential damage. Stay informed and stay safe under the sun!
The UV Index throughout the day showcases a striking progression of solar intensity. Starting at a gentle 1 at 7:00 AM, it gradually climbs to a moderate 4 by 9:00 AM. The real heat hits at 11:00 AM, reaching a peak of 11, signifying that sun protection is essential during these hours. As the afternoon unfolds, the levels begin to taper off, with 10 at 2:00 PM and then descending to 4 by 5:00 PM. The day winds down with a comfortable 1 by 7:00 PM, making it a perfect time to enjoy the cool evening sun. Remember, the higher the UV Index, the more crucial it is to stay protected!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index displays significant seasonal fluctuations, notably peaking during the summer months. High-risk months where UV exposure is most critical include May, June, and July, with extreme UV Index levels of 11 and 12, resulting in a burn time as short as 10 minutes. Other notably high months are March and April, categorized as very high, with burn times dropping to 15 minutes. It is essential for visitors and residents to take preventative measures during these months: seek shade, wear protective clothing, and apply broad-spectrum sunscreen to minimize the risk of skin damage. As the year progresses toward the cooler months of October through December, UV exposure decreases, but caution is still advised during high risk months like November. Staying aware of these changes can ensure a safer and more enjoyable outdoor experience year-round.
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 |
| Marks | 4 | 6 | 8 | 10 | 11 | 12 | 11 | 10 | 9 | 7 | 6 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |