Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Saint Francis, United States, where the climate can lead to significant sun exposure risks. As the UV levels reach their peak in the middle of the day, awareness of these fluctuations is essential for preventing sunburn and safeguarding your skin health. With typical summer days yielding high UV readings—often climbing to 10 and beyond—it's vital to take proactive measures to protect yourself from harmful rays that can lead to skin damage and increase the risk of skin cancer. Stay informed and keep your skin safe as you enjoy the sunny days that are characteristic of our Dwa climate!
As the day unfolds, the UV Index rises sharply, peaking at a dramatic 10 between 1:00 PM and 2:00 PM—a clear indication that sun protection is crucial during these hours. Starting from a modest 1 at 7:00 AM, the index climbs steadily, reaching 4 by 10:00 AM. By 11:00 AM, it escalates to 7, and just before noon, it hits 9, urging outdoor enthusiasts to take cover or apply sunscreen. The afternoon sees a slight decline, with values tapering to 5 by 5:00 PM and further down to 2 as the sun sets. This dynamic pattern highlights the importance of being sun-smart, especially during the peak hours of 12:00 PM to 2:00 PM.
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 1 | low | 45 min |
08:00 | 1 | low | 45 min |
09:00 | 2 | low | 45 min |
10:00 | 4 | 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 | 5 | moderate | 30 min |
18:00 | 3 | moderate | 30 min |
19:00 | 2 | low | 45 min |
Throughout the year, UV index levels exhibit significant seasonal variation, with high-risk months primarily ranging from April to September. During this period, the UV Index escalates from 8 in April to a peak of 11 in June, classifying June as having an extreme exposure category where one can burn in just 10 minutes. As summer progresses, the UV Index remains very high, with safe exposure times dwindling to 15 minutes by July and August. As fall approaches, the risk diminishes, with levels dropping to moderate in October, November, and December. For visitors and residents, it is crucial to take precautions, especially during the high UV months like May, June, and July, by wearing protective clothing, seeking shade, and applying sunscreen to minimize the risk of 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 |
Saint Francis | 3 | 5 | 6 | 8 | 9 | 11 | 10 | 10 | 8 | 5 | 4 | 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 |