Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Canyon Day, United States, where the sun's intensity can pose significant risks throughout the year. Being aware of UV levels not only helps in preventing sunburn but also plays a vital role in maintaining long-term skin health. With Canyon Day's Csa climate characterized by strong sunlight, especially during midday hours where the UV Index peaks at 12, residents should remain vigilant about sun safety. By keeping an eye on the UV Index, you can enjoy the outdoors while protecting your skin from harmful effects.
The UV Index throughout the day paints a vivid picture of sun intensity, peaking sharply in the late morning to early afternoon hours. At 7:00 AM, the index starts off at a mild 2, gradually climbing to 3 by 8:00 AM. As the sun ascends, it takes a significant leap to 6 at 9:00 AM, hitting a striking 9 by 10:00 AM. The real intensity ensues around midday, with the index reaching its zenith at 12 from 12:00 PM to 1:00 PM, demonstrating the importance of sun protection during these critical hours. As the afternoon progresses, the UV levels start to decline, dropping to 10 at 2:00 PM and tapering off to 5 by 4:00 PM. By the late evening, the index significantly diminishes, falling back to 1 by 6:00 PM and remaining low through 7:00 PM. This hourly trajectory serves as a clear reminder to stay vigilant about sun safety, especially during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV exposure levels vary significantly, with the most intense months being March through September. During this period, particularly from April to September, the UV Index reaches extreme levels (11-13), corresponding to a burn time of just 10 minutes. February marks the beginning of the high-risk season with an Index of 7, while the months of October and November see a gradual decrease, falling back to moderate and high exposure categories, respectively. Visitors and residents should be particularly cautious during the summer months, adopting protective measures such as wearing sunscreen, protective clothing, and seeking shade, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. By staying informed about these seasonal changes, individuals can better protect their skin and overall health.
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 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |
| Canyon Day | 5 | 7 | 10 | 11 | 12 | 13 | 12 | 12 | 11 | 8 | 6 | 5 |