Last updated: June 2, 2025
Understanding the UV Index is crucial for residents of Cobb, United States, where the combination of a Csb climate and varying UV exposure levels can significantly impact skin health. With peak UV levels reaching as high as 11 during midday hours, awareness of these fluctuations is essential for preventing sunburn and long-term skin damage. As you navigate the sunny days in Cobb, staying informed about UV levels can help you enjoy the outdoors safely while protecting your skin from harmful rays.
The UV Index reaches its peak intensity between 12:00 PM and 2:00 PM, hitting a formidable high of 11. As the sun rises, the index begins at a gentle 1 at 7:00 AM, gradually escalating to 2 by 8:00 AM. By 9:00 AM, it ramps up to 4, and then surges past 5 at 10:00 AM, finally soaring to 9 at 11:00 AM. The intensity peaks at 12:00 PM with a UV index of 10, remaining steady at 11 until 2:00 PM. Post-peak, the UV radiation begins to decline, dropping to 9 at 3:00 PM, and then steadily descending back to 1 by 7:00 PM. It’s crucial to protect your skin during those midday hours when UV levels are at their 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 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index experiences significant fluctuations, with the most critical months for UV exposure being April through August. During April, the UV Index reaches 9, categorized as very high, with a burn time of only 15 minutes. This escalates to an extreme level of 11 in May, June, and July, where individuals can get sunburned in just 10 minutes of unprotected exposure. While August and September still present high UV levels of 10 and 9 respectively, the risk begins to diminish by October, returning to high with a 7 index. During the winter months of November and December, the UV Index lowers to 4 and 3, marking the moderate category and allowing for longer burn times of 30 minutes. For the benefit of visitors and residents, it is crucial to take protective measures during the high-risk months, particularly from April to August, by wearing sunscreen, protective clothing, and seeking shade during peak sun hours.
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 |
| Cobb | 3 | 5 | 7 | 9 | 11 | 11 | 11 | 10 | 9 | 7 | 4 | 3 |
| 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 |