Last updated: May 3, 2025
In Windsor, United States, awareness of the UV Index is crucial for maintaining your skin health, especially during the warmer months. Understanding UV levels can significantly aid in preventing sunburns and reducing the risk of skin damage over time. With a humid subtropical climate (Cfa) that brings ample sunshine, Windsor residents face unique challenges from ultraviolet exposure, particularly during peak hours when the UV Index can soar to 10 from 12 PM to 2 PM. Stay informed and take the necessary precautions to enjoy the sun safely, protecting your skin while making the most of your time outdoors.
The UV Index shows a notable progression throughout the day, beginning at a minimal level of 1 at 07:00. As the sun climbs higher, the index escalates, peaking at an impressive 10 between 13:00 and 14:00—the height of sun exposure. The morning hours see gradual increases, reaching 8 by 11:00, while 12:00 features a 9, signaling a strong need for protection against harmful rays. Following the peak, the index begins to gently decline, dropping to 6 by 16:00 and down to 3 by 17:00, before winding down to 1 again by 19:00. This data serves as a crucial reminder that midday sun protection is essential for safety during the hours when UV rays are at their strongest.
| 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 | 5 | moderate | 30 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 9 | 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 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, so too does the UV Index, which indicates the intensity of UV radiation. January and December feature moderate levels (UV Index 3), allowing for a burn time of 30 minutes. From February to March, UV levels rise, with March seeing a high index of 6 and a shorter burn time of 25 minutes. The real risk peaks in April and May with an extreme UV Index of 10, followed by a staggering 11 in both June and July, where exposure time drops to just 10 minutes. As the summer continues into August and September, the UV levels remain very high at 10 and 9 respectively, requiring diligent sun protection. October witnesses a decrease to a high index of 7, while November returns to moderate levels. Visitors and residents are advised to exercise caution during the high-risk months of April through September, ensuring to wear protective clothing, apply sunscreen regularly, and seek shade during peak sun hours to minimize skin 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 |
| Windsor | 3 | 5 | 6 | 10 | 10 | 11 | 11 | 10 | 9 | 7 | 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 |