Last updated: July 2, 2025
In Carnegie, United States, understanding the UV Index is crucial for protecting your skin from harmful sun exposure. With UV levels peaking between 11 AM and 3 PM, reaching as high as 12, awareness of these changes can help residents effectively prevent sunburn and long-term skin damage. The Cfa climate in this region means plenty of sunny days, which brings a unique set of challenges when it comes to UV risks. By staying informed about the daily UV Index, you can confidently enjoy the outdoors while prioritizing your skin health.
At sunrise, the UV Index sits comfortably at 1, gradually rising as the day unfolds. By 09:00, it reaches 3, signaling the start of increased sun exposure. The real heat kicks in by 10:00, soaring to 5, and peaks dramatically at 12:00 with an alarming 10. The zenith arrives at 13:00, hitting 11, followed closely by a high of 12 at 14:00—an essential reminder to seek shade and protect your skin. As daylight wanes, the UV Index declines, tapering off to 10 by 15:00, and returning to a more manageable 5 at 17:00. By the time the sun sets, it cools down to 3 at 18:00, and finally drops to 1 by 19:00, highlighting the critical hours to stay sun-safe during midday!
| 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 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, so do UV levels, with notable peaks during the summer months. From January (UV Index 4, moderate exposure) to February (UV Index 6, high), there is a gradual increase in UV radiation. However, March and April see a significant rise, with UV levels reaching 8 and 10 respectively, categorizing them as very high. May through August marks the highest risk, with an extreme UV Index of 11 to 12 and a minimum burn time of just 10 minutes. This period is crucial for visitors and residents to exercise heightened caution and protection measures such as sunscreen, protective clothing, and shade. As summer fades into September (UV Index 9, very high) and declines into the more moderate levels of October (UV Index 7) and November/December (UV Index 4), it is essential to remain vigilant, particularly during the peak months, to minimize the risk of 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 |
| Carnegie | 4 | 6 | 8 | 10 | 11 | 11 | 12 | 11 | 9 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |