Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Moapa Valley, United States, as it serves as a vital indicator of the sun’s intensity and potential risks associated with ultraviolet radiation. With summer temperatures soaring in this arid BWk climate, the UV levels can reach dangerous heights, peaking at a staggering 11 around noon. Recognizing these levels not only aids in sunburn prevention but is also essential for maintaining long-term skin health. By staying informed, you can confidently enjoy the sunny days that Moapa Valley has to offer while protecting yourself from the harmful effects of UV exposure.
The UV Index soared to its highest point during the midday hours, peaking at a staggering 11 between 12:00 PM and 1:00 PM. As the sun climbed in the sky, the intensity gradually increased from a mere 1 at 7:00 AM, reaching 3 by 8:00 AM, and then spiking to 5 by 9:00 AM. The 10:00 AM mark saw a rapid rise to 7 and continued to climb until it hit its peak. Afterward, the index began to decline, dropping to 9 at 2:00 PM and gradually tapering off to moderate levels of 5 by 4:00 PM. By late afternoon, the UV Index fell to 2 by 5:00 PM, finally settling back to 1 as evening approached. Be cautious during the peak hours around noon when the sun's rays are most potent!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | 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, the UV Index exhibits significant seasonal variations, peaking during the summer months of May to August, where it reaches extremes of 11 to 12. The highest risk occurs in May, June, and July, with burn times as short as 10 minutes under these conditions. March and April also present considerable UV exposure, categorized as very high, with burn times of just 15 minutes. Visitors and residents should exercise caution from late winter through summer, especially during these high-risk months, by seeking shade, wearing protective clothing, and applying broad-spectrum sunscreen regularly to minimize the risk of skin damage. As the season transitions into fall and winter, UV levels decrease, offering more moderate exposure from October to December.
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 |
| Moapa Valley | 4 | 6 | 8 | 10 | 11 | 12 | 12 | 11 | 10 | 7 | 5 | 3 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |