Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Carlisle, United States, as it serves as a key indicator for sun exposure and skin health. With summer temperatures often soaring in this Cfa climate zone, awareness of UV levels is vital to prevent sunburn and reduce long-term skin damage. At midday, the UV Index can peak as high as 10, posing significant risks, while lower levels in the morning and late afternoon still warrant caution. By familiarizing yourself with these fluctuations, you can enjoy outdoor activities safely while protecting your skin from harmful effects.
The UV Index chart reveals a dynamic daily pattern of solar intensity. Starting early in the day, the UV Index remains low, peaking at 1 by 08:00. However, as the sun reaches its zenith, the index surges dramatically—hitting 7 by 11:00 and soaring to a maximum of 10 between 13:00 and 14:00. This signals a critical window for sun exposure, where protection is essential. As the afternoon progresses, the UV levels begin to decline, dropping to 4 by 17:00, before tapering off to 1 again by evening. To stay safe, it's vital to be cautious during those peak hours!
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 | 7 | high | 25 min |
12:00 | 9 | very high | 15 min |
13:00 | 10 | very high | 15 min |
14:00 | 10 | very high | 15 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, the UV Index exhibits significant seasonal changes, peaking during the summer months. From March to September, the UV Index rises sharply, reaching a maximum of 10 during the summer, indicating very high exposure risk. The high-risk months for sun exposure are April through September, when burn times shorten to just 15 minutes. Residents and visitors are advised to take proper sun safety precautions during these months, including wearing protective clothing, using broad-spectrum sunscreen, and seeking shade during peak hours. As the UV Index lowers in October, November, and December, the burn times increase to 25-30 minutes, suggesting a decrease in risk but still warranting sun protection on sunny days.
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 |
Carlisle | 3 | 5 | 7 | 9 | 10 | 10 | 10 | 10 | 8 | 6 | 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 |