Last updated: July 2, 2025
Understanding the UV Index is crucial in Castle Pines North, where the sun's rays can be intense due to its BSk climate. As the UV levels peak during the day, especially around noon, awareness of these levels can aid in preventing sunburn and protecting your skin health. With maximum UV readings reaching 12 in the heart of the day, it’s essential for residents and visitors alike to stay informed about daily fluctuations to ensure safe and enjoyable outdoor activities while minimizing risks associated with overexposure to the sun.
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 | 4 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 12 | 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, 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 |
| Castle Pines North | 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 |