Last updated: June 2, 2025
In Hills, United States, staying informed about the UV Index is crucial for safeguarding your skin and overall health. Understanding the varying levels of ultraviolet radiation throughout the day helps you take proactive measures against sunburn and long-term skin damage. With a Dfa climate that features hot summers and varying seasonal changes, Hills experiences significant UV exposure, peaking at midday when levels soar to a staggering 11. By tuning in to the UV Index, you can enjoy the outdoors safely while protecting your skin from harmful UV rays.
The UV Index shows a dramatic rise as the morning unfolds, starting at a low of 1 at 07:00. By 08:00, it gently climbs to 2, and by 09:00, it reaches 3. The mid-morning reveals a surge, peaking at 5 by 10:00. As the sun reaches its zenith, the UVI soars to a staggering 10 at noon, with a climb to 11 at 13:00, marking the highest point of the day. Just after, it gradually dips, but remains considerable at 10 by 14:00 and 9 at 15:00. The afternoon sees a striking decrease to 7 at 16:00 and continues to fall, landing at 3 by 18:00, before tapering off to 1 by 19:00. It's a clear reminder to stay sun-safe during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | 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 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
The UV Index exhibits significant seasonal fluctuations, with high-risk months generally occurring from April through September. During these months, the UV Index peaks, reaching an extreme level of 11 in June, where exposure should be limited to just 10 minutes to avoid sunburn. The remainder of the summer, particularly in July and August, also presents very high levels, suggesting burn times of only 15 minutes. Conversely, the winter months, particularly January and December, feature lower indices of 2 and 3, respectively, meaning sun exposure is less hazardous, allowing for burns in approximately 45 minutes. Residents and visitors are strongly advised to take necessary precautions during higher UV Index months, including wearing sunscreen, protective clothing, and seeking shade, especially between 11 a.m. and 3 p.m., when the sun is at its most intense. As the seasons change, adjusting sun safety practices is essential for safeguarding skin health.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hills | 2 | 5 | 5 | 8 | 9 | 11 | 10 | 9 | 8 | 5 | 3 | 3 |
| 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 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |