Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Rockwell, United States, where sunny days can lead to increased exposure to harmful ultraviolet rays. Awareness of UV levels not only aids in preventing sunburn but also plays a vital role in maintaining long-term skin health. With Rockwell’s Cfa climate zone, residents can experience significant UV exposure, particularly during midday hours when the index peaks at 10. Being informed about these levels empowers you to protect your skin and enjoy the sun safely!
The UV Index offers a clear snapshot of sun intensity throughout the day. Starting off gently, the morning hours (07:00 and 08:00) register a modest index of 1, making it safe to enjoy some outdoor activities. As the day progresses, the sun’s rays ramp up, peaking at 10 from 12:00 to 14:00—the ideal time for sun safety reminders. The UV Index then gradually declines, showcasing a friendly 8 at 15:00 before tapering down to 4, 2, and finally 1 by the evening hours. As such, it's crucial to stay vigilant around midday and seek shade while enjoying the outdoors.
| 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 | 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 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index displays significant seasonal fluctuations that warrant attention from both visitors and residents. From January (UV Index 4, moderate exposure) to February (UV Index 6, high exposure), there is a notable increase in ultraviolet radiation, leading to higher sunburn risk. The months of March through June represent high-risk periods, with UV Index values peaking at 11 in June (extreme exposure) and maintaining levels above 8 until September. During this summer surge, burn times can dwindle to as little as 10 minutes in June. September to October shows a slight decrease, though values remain high (UV Index 9-8). Following this, November and December return to more moderate levels (UV Index 5 and 3), allowing for longer exposure times without an immediate burn risk. It is advisable for everyone to stay vigilant during the high-risk months, particularly from March to September, and to employ protective measures such as wearing sunscreen and protective clothing, especially during peak hours.
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 |
| Rockwell | 4 | 6 | 8 | 10 | 10 | 11 | 10 | 10 | 9 | 8 | 5 | 3 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |