Last updated: August 1, 2025
Understanding the UV Index is crucial for residents of Winchester, United States, as it informs us about the sun's intensity and helps in making informed decisions for our skin health. With UV levels peaking at 12 in the afternoon, awareness is key to preventing sunburn and long-term skin damage. Living in a BWk climate zone, Winchester experiences varying UV exposure throughout the year, emphasizing the need for vigilance against potential risks, especially during those sunlit hours. Stay protected and enjoy the outdoors safely by keeping an eye on the UV Index!
Throughout the day, the UV Index (UVI) experiences a notable ascent, peaking at 13 around 1:00 PM—a time that signals the highest risk of harm from unprotected sun exposure. Starting the day with a low 1 at 7:00 AM, the UVI climbs steadily, reaching 12 by noon. The intensity wanes post-peak, dropping back to 6 by 4:00 PM, and further decreasing to a mild 1 by 7:00 PM. Those planning outdoor activities should take heed of the peak hours between 11:00 AM and 1:00 PM, where the index hits critical levels, urging the use of sunscreen, hats, and shade to stay safe.
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 | 7 | high | 25 min |
11:00 | 9 | very high | 15 min |
12:00 | 11 | extreme | 10 min |
13:00 | 11 | extreme | 10 min |
14:00 | 10 | very high | 15 min |
15:00 | 7 | high | 25 min |
16:00 | 5 | moderate | 30 min |
17:00 | 3 | moderate | 30 min |
18:00 | 1 | low | 45 min |
19:00 | 1 | low | 45 min |
The UV Index experiences significant seasonal changes, peaking during the summer months. From January to February, UV exposure rises moderately, but by March and April, it escalates to very high levels, indicating increasing risk. The high-risk months are clearly May, June, July, and August, when the UV Index reaches extreme levels of 11 to 13, resulting in a rapid burn time of just 10 minutes. As summer transitions to fall, the UV Index gradually decreases, becoming moderate by November and December. Visitors and residents are advised to take extra precautions during high-risk months by wearing sunscreen, protective clothing, and limiting sun exposure during peak hours to mitigate the harmful effects of intense UV radiation.
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 |
Winchester | 4 | 6 | 8 | 10 | 11 | 12 | 13 | 11 | 10 | 7 | 5 | 3 |
Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |