Last updated: July 2, 2025
In Whiteriver, United States, understanding the UV Index is essential for safeguarding skin health and preventing sunburn. With the desert-like climate in this region, residents and visitors alike face significant UV exposure, especially during the peak hours of 10 AM to 2 PM when the index reaches a maximum of 12. Keeping track of the UV levels not only helps you enjoy outdoor activities safely but also empowers you to make informed decisions to protect yourself and your loved ones from harmful ultraviolet rays. Whether you're hiking, playing sports, or simply basking in the sun, being aware of the UV Index can significantly influence your sun safety strategies.
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 |
| Whiteriver | 5 | 7 | 10 | 11 | 12 | 13 | 12 | 12 | 11 | 8 | 6 | 5 |