Last updated: May 3, 2025
Understanding the UV Index in Allen, United States, is crucial for safeguarding your skin and overall health. With sunburns being a significant risk during peak UV levels, particularly between 11 AM and 3 PM when the index can soar to 11, awareness of these fluctuating UV conditions is vital. Residents of Allen experience a humid subtropical climate (Cfa), characterized by hot summers that elevate UV exposure risks. By staying informed about the UV Index, you can effectively protect yourself and your loved ones from harmful effects while enjoying the sunny days that this beautiful community has to offer.
The UV Index for the day showcases a striking pattern, starting moderate at 7:00 AM with a value of 1. As the sun climbs higher, the index steadily rises, hitting 3 by 9:00 AM, and then surging to a peak of 11 between 1:00 PM and 2:00 PM. This indicates a high risk of harm from unprotected sun exposure during midday. Following the peak, the UV Index gradually declines to 4 by 5:00 PM and further decreases to 1 by 7:00 PM, emphasizing the critical importance of sun protection during the intense midday hours. It’s advisable to seek shade and wear sunscreen if you're outside during the peak period!
| 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 | 11 | extreme | 10 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 |
As the seasons change, so do the levels of ultraviolet (UV) radiation, significantly impacting exposure risk for visitors and residents. From January to March, UV Index values gradually increase from 4 (moderate) in January to 7 (high) in March, with burn times decreasing from 30 minutes to 25 minutes. The real concern arises in April and May, when the UV Index peaks at 10 (very high) and burn times shrink to just 15 minutes. The summer months of June, July, and August pose the greatest risk, showcasing an extreme UV Index of 11, allowing only a 10-minute exposure before burn. As fall arrives, September sees a slight reduction to 9 (very high) before tapering off to 7 in October, while burn times increase back to 25 minutes. By November and December, the index lowers to 5 and 4 (both moderate) with burn times returning to 30 minutes. Visitors and residents should take precautions during the high-risk months of April through August, such as wearing sunscreen, protective clothing, and seeking shade, to minimize the risk of harmful UV exposure.
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 |
| Allen | 4 | 6 | 7 | 10 | 10 | 11 | 11 | 11 | 9 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |