Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Chatham, United States, where the climate typically falls under the Cfa classification, leading to varied sun exposure throughout the year. With UV levels peaking at a dangerous 10 during midday, awareness of these levels is essential for preventing sunburn and protecting skin health. By keeping an eye on the UV Index, Chatham residents can make informed choices about sun protection, ensuring a safer outdoor experience while enjoying the beautiful sunshine that this vibrant locale offers.
The UV Index on this particular day paints a striking picture of sun intensity as it unfolds throughout the hours. Starting with a gentle maximum of 1 at 07:00, the sun gradually rises, peaking to a significant 10 by midday at 12:00, signaling the height of solar radiation. This intensity remains unwavering at 10 from 13:00 to 14:00, providing a bold reminder to stay sun-safe. As the day progresses, the UV Index begins to retreat, dipping to 8 at 15:00, and continuing its descent to a milder 1 by 19:00. Whether lounging outdoors or engaging in activities, it's essential to be mindful of these fluctuations and adequately 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 | 3 | moderate | 30 min |
| 10:00 | 6 | high | 25 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 | 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, the UV Index experiences significant seasonal changes, with the highest levels occurring from March to October. The high-risk months are typically March, April, May, June, July, August, September, and October, when the index reaches very high to extreme levels. Specifically, June presents the greatest risk with a UV Index of 11, indicating extreme exposure and a burn time of only 10 minutes. During these months, it is crucial for both visitors and residents to take proper precautions, including wearing sunscreen, protective clothing, and sunglasses, and seeking shade during peak hours (10 a.m. to 4 p.m.). In contrast, the months of January, February, November, and December have a moderate exposure category, allowing for longer burn times of 30 minutes. Awareness of these fluctuations can help everyone enjoy outdoor activities safely.
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 |
| Chatham | 3 | 6 | 8 | 9 | 10 | 11 | 10 | 10 | 9 | 8 | 5 | 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 |