Last updated: August 1, 2025
Understanding the UV Index is crucial for the residents of Greenwood Village, as it provides valuable insights into the sun’s ultraviolet radiation levels throughout the day. Being aware of these levels is essential for sunburn prevention and maintaining long-term skin health. In this charming city, located in a semi-arid climate (BSk), UV exposure can escalate quickly, particularly between late morning and early afternoon hours—peaking at a concerning 12 around noon. By keeping track of the UV Index, you can enjoy the sunny outdoors while protecting your skin from harmful effects.
The UV Index throughout the day showcases a dynamic surge, peaking at an impressive 12 between 1:00 PM and 2:00 PM. The morning starts slowly, with values of 1 at 7:00 AM and climbing to 2 by 8:00 AM. As the sun climbs higher, the index sharply rises, hitting 10 by 11:00 AM and reaching a sizzling 11 at noon. After the midday crescendo, there's a gradual decline, dropping to 9 at 3:00 PM, and eventually settling back to 1 by 7:00 PM. This pattern emphasizes the importance of sun protection during peak hours, especially from 11:00 AM to 2:00 PM, where the risk of harm from UV exposure is at its highest.
| 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 | 9 | 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 | 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, UV Index levels experience significant fluctuations, with the highest risk months occurring from April to August, where the UV Index reaches an extreme level of 12. During these months, the recommended burn time is as brief as 10 minutes, emphasizing the importance of protective measures against harmful UV radiation. Notably, March and September also present very high UV levels of 9 and 10, respectively, with a burn time of 15 minutes. In the winter months (January, November, December), UV exposure is less intense, categorized as moderate to high with burn times ranging from 25 to 30 minutes. Visitors and residents are advised to take extra precautions during high-risk months, such as wearing sunscreen, protective clothing, and seeking shade to minimize sun damage.
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 |
| Greenwood Village | 4 | 6 | 9 | 11 | 12 | 12 | 12 | 11 | 10 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |