Last updated: June 2, 2025
In Chester, United States, awareness of the UV Index is crucial for protecting your skin and overall health. Understanding UV levels helps you take proactive measures against sunburn and long-term skin damage, especially during peak hours when the UV index soars to a maximum of 11 from noon to 1 PM. Chester's climate, characterized by humid subtropical conditions, often leads to high UV exposure, making it essential for residents to stay informed and safeguard themselves against harmful rays. By keeping an eye on the UV index, you can enjoy the beautiful Chester outdoors while prioritizing your skin's health.
As the sun rises, the UV Index begins its modest ascent, starting at a gentle 1 around 7:00 AM and 8:00 AM. By 9:00 AM, it picks up to 3, hinting at a sunnier day ahead. The peak intensity occurs from 11:00 AM to 1:00 PM, where it skyrockets to a striking 10 at 12:00 PM, reaching an impressive 11 by 1:00 PM—perfect for those sun-seeking adventurers! However, after this zenith, the UV Index gradually declines, dropping to 9 by 3:00 PM and further easing to a 4 by 5:00 PM. By 6:00 PM, it falls to 2, and as the sun sets, it returns to a safe 1 by 7:00 PM. Remember to take precautions during those peak hours to protect your skin from harmful rays!
| 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 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 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, UV exposure fluctuates significantly, with the highest risk months typically being June, July, and August, where the UV Index peaks at 11, indicating extreme exposure levels with a burn time of just 10 minutes. From March to October, UV levels remain elevated, with March and April also categorized as very high, reaching an index of 8 to 10. Visitors and residents are strongly advised to take precautions during these months by wearing protective clothing, applying broad-spectrum sunscreen, and limiting sun exposure during peak hours. In contrast, the winter months, particularly January and December, present a lower risk with moderate UV levels of 3 to 4, allowing for more relaxed sun safety measures. However, it remains wise to stay informed and cautious year-round.
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 |
| Chester | 4 | 6 | 8 | 10 | 10 | 11 | 11 | 10 | 9 | 8 | 6 | 3 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |