Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Stonington, United States, as it plays a vital role in preserving skin health and preventing sunburn. With a temperate climate characterized by moderate summers, Stonington experiences significant UV exposure, particularly during the peak hours between 10 AM and 2 PM when levels can soar to 8 and even 9. By being aware of these UV levels, locals can take necessary precautions to protect themselves and their families from harmful ultraviolet rays, ensuring enjoyable outdoor activities without the risk of damaging sunburns. Stay informed and safeguard your skin!
The hourly UV Index reveals a gradual rise throughout the morning, starting at a mild 1 at 7:00 AM, then doubling to 2 by 8:00 AM. As the day progresses, the sun’s intensity peaks with a notable 9 at 1:00 PM, providing optimal conditions for sun-seekers. The UV Index holds steady at 8 from 11:00 AM to 1:00 PM, indicating a high risk for unprotected skin. Post-peak, the intensity wanes, dropping back to 6 by 3:00 PM and further declining to 1 by 6:00 PM, signaling a shift toward safer levels as evening approaches. Be sure to protect your skin during those peak hours!
| 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 | 8 | very high | 15 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV exposure varies significantly, with the highest risk occurring during the summer months of May through August. During this period, the UV Index reaches a peak of 9, classified as very high, with a minimal burn time of just 15 minutes. Conversely, the UV Index is at its lowest in January and December at 2, indicating a low risk of harm from sun exposure, allowing for a burn time of 45 minutes. April and September mark transitional months where the UV Index is high at 7, prompting caution with a burn time of 25 minutes. To protect against harmful UV radiation, it is crucial for both visitors and residents to take appropriate precautions, particularly from May to August, such as 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stonington | 2 | 4 | 5 | 7 | 9 | 9 | 9 | 8 | 7 | 5 | 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 |