Last updated: June 2, 2025
Understanding the UV Index is crucial for residents of Alderson, United States, where the unique Cfb climate brings both beauty and potential risks under the sun. With UV levels peaking at 11 between noon and 2 p.m., awareness is essential to prevent sunburn and promote long-term skin health. By recognizing the importance of these fluctuations in UV exposure, individuals can take proactive measures, ensuring safe outdoor activities while protecting their skin. Whether you're enjoying the scenic outdoors or simply running errands, being informed about the UV Index can help maintain your health and well-being in Alderson’s sunny days.
At sunrise, the UV Index begins its ascent, peaking at 1 by 07:00. As the day progresses, it rises steadily, hitting 2 by 08:00 and reaching a moderate 3 by 09:00. The intensity ramps up significantly from 10:00, where it soars to 6, and then it continues its climb to a striking 10 at 12:00. The highest point arrives at 13:00 and 14:00, where the UV Index maxes out at 11, signaling a time when sun protection is crucial. As the afternoon wanes, the index gradually decreases, settling at 9 by 15:00. By late afternoon, the values dip to 4 at 17:00, and then cool down to 2 by 18:00, before fading to 1 by 19:00 as daylight fades. It's a clear reminder to stay protected during the sunniest 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 | 6 | high | 25 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 |
Throughout the year, the UV Index exhibits significant seasonal changes, with the highest levels occurring in May, June, and July, where it reaches an extreme index of 11. These months pose the greatest risk for sunburn, with a quick burn time of just 10 minutes. The high-risk months to be particularly cautious are March through August, as the UV Index remains very high to extreme during this period. Visitors and residents should take proactive measures, including wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade during peak sunlight hours, especially from 10 a.m. to 4 p.m. Conversely, in the winter months of December and January, the UV Index is lower at 3-4, indicating a moderate risk with a burn time of 30 minutes, allowing for slightly more leeway in sun exposure. Regardless of the season, it is essential to stay informed and protect yourself from harmful UV rays.
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 |
| Alderson | 4 | 6 | 8 | 10 | 11 | 11 | 11 | 10 | 9 | 7 | 5 | 3 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |