Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Marietta, United States, where the warm and humid climate can lead to higher levels of UV radiation, especially during the peak of summer. Awareness of UV levels is essential for sunburn prevention and maintaining skin health, as excessive exposure can result in immediate harm and long-term consequences, such as skin cancer. With maximum UV Index values reaching as high as 11 in the afternoon, it's important for Marietta residents to stay informed about daily UV fluctuations, allowing them to take appropriate precautions against harmful sun exposure. Stay protected and enjoy the sun safely!
The UV Index for the day showcases a striking pattern, starting moderate at 7:00 AM with a value of 1. As the sun climbs higher, the index steadily rises, hitting 3 by 9:00 AM, and then surging to a peak of 11 between 1:00 PM and 2:00 PM. This indicates a high risk of harm from unprotected sun exposure during midday. Following the peak, the UV Index gradually declines to 4 by 5:00 PM and further decreases to 1 by 7:00 PM, emphasizing the critical importance of sun protection during the intense midday hours. It’s advisable to seek shade and wear sunscreen if you're outside during the peak period!
| 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 | 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, ultraviolet (UV) exposure fluctuates significantly, necessitating awareness among residents and visitors. From January to April, the UV Index begins to rise, starting at a moderate level of 4 and peaking at 10 in April, indicating a shift to very high exposure. The months of May through August present the highest risk, with the UV Index consistently at an extreme 11, where the burn time reduces to just 10 minutes. Following this peak, September and October see a slight decrease, with the UV Index returning to 10 and 8, respectively, both still classified as very high. By November and December, levels drop back down to high and moderate categories with indices of 6 and 4, allowing for safer outdoor activities but still requiring caution. Residents and visitors should take protective measures, especially during the high-risk months of May to August, by wearing sunscreen, protective clothing, and seeking shade during peak sunlight hours to minimize the risk of UV damage.
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 |
| Marietta | 4 | 6 | 8 | 10 | 11 | 11 | 11 | 11 | 10 | 8 | 6 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |