Last updated: June 2, 2025
Understanding the UV Index in Kayenta, United States is essential for anyone who enjoys the outdoors, given the region's semi-arid climate and high levels of sun exposure. With UV levels reaching a maximum of 12 midday, awareness of these fluctuations can significantly contribute to sunburn prevention and overall skin health. Understanding these UV levels helps residents and visitors alike protect themselves from harmful effects, making it vital to monitor the index, especially during the peak hours of 10 AM to 4 PM when levels soar. Stay informed and enjoy Kayenta's beautiful landscapes while safeguarding your skin!
As the sun rises, the UV Index begins its ascent, reaching 1 by 07:00. By 08:00, it climbs to 2, signaling the start of the day’s UV exposure. Things heat up quickly, reaching 4 at 09:00 and then jumping to 6 by 10:00. The intensity peaks dramatically at 12:00, hitting 11, and just an hour later, 13:00, it reaches its maximum of 12. This high level continues until 14:00, where it remains steady. As the afternoon progresses, the UV Index begins to decline: jotting down to 10 at 15:00, then 8 at 16:00, and tapering off to 5 by 17:00. By the evening hours, it gently reduces to 3 at 18:00 and settles back to 1 by 19:00. This cycle underscores the importance of sun safety during peak hours, especially between 11:00 and 14:00 when UV exposure is at its strongest.
| 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 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index levels experience notable changes, impacting sun exposure and burn risk for visitors and residents alike. The high-risk months are March through August, where the UV Index peaks at 12 and falls within the extreme exposure category, necessitating strict sun safety measures and limiting sun exposure to 10 minutes for optimal protection. Specifically, March marks a transition into higher UV values, soaring to 9, while April, May, June, and July feature extreme values that require heightened caution. As summer winds down, September and October still maintain a very high UV Index at 10 and 8, respectively, with 15-minute burn times. In contrast, the winter months of January, November, and December see moderate UV exposure, with a UV Index of 4-6 and 30-minute burn times. Visitors and residents should take proactive steps, such as wearing protective clothing and sunscreen, particularly during the high-risk months to minimize health risks associated with UV exposure.
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 |
| Kayenta | 4 | 6 | 9 | 11 | 12 | 12 | 12 | 11 | 10 | 8 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |