Last updated: May 3, 2025
In Canyon Day, United States, being aware of the UV Index is crucial for safeguarding your skin and overall health. The UV levels here can spike significantly, especially during the peak hours of 10 AM to 2 PM, reaching a maximum of 12, which poses a high risk for sunburn and long-term skin damage. Understanding these fluctuations is essential for effective sun protection, especially in this Csa climate, where intense sunlight can lead to increased UV exposure. Stay informed and take proactive measures to enjoy the beautiful outdoors while keeping your skin healthy!
The UV Index for the day reveals a dynamic shift in sun exposure, peaking dramatically between 11:00 AM and 1:00 PM. Starting the morning with a mild maximum of 2 at 7:00 AM, the index steadily rises, reaching 12 by midday—an indication of high risk for harm from unprotected sun exposure. As the afternoon progresses, it dips to 10 at 2:00 PM and then gradually decreases to a more moderate level of 4 by 4:00 PM. By the evening, the UV Index settles back down to 1 by 6:00 PM, signaling a safe time to enjoy the outdoors again. Be sure to protect your skin 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 | 4 | 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 |