Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Green Valley, United States, where the dry BSk climate often leads to high levels of sun exposure. With UV ratings peaking at 12 during midday, it's essential to be aware of the potential risks of sunburn and long-term skin damage. By monitoring UV levels, you can take proactive steps to protect your skin health and enjoy outdoor activities safely. Awareness of these UV fluctuations not only helps in preventing immediate discomfort but also plays a significant role in reducing the risk of skin cancer over time. Stay informed and safeguard your skin while enjoying the sunny charms of Green Valley!
The UV Index throughout the day exhibits a dynamic rise and fall, showcasing its peak intensity around midday. At 07:00, the index starts off at a modest 1, climbing steadily to 3 by 08:00. The real action begins at 09:00, where it skyrockets to 6, and by 10:00, it reaches a noteworthy 8. As the sun reaches its zenith, the index hits a blistering maximum of 12 from 12:00 to 13:00, signaling a critical time for sun safety. The intensity begins to taper in the afternoon, dropping to 10 at 14:00, then descending gradually to 5 by 16:00. As evening approaches, the index dwindles, returning to a safe 1 by 18:00, and remaining there through 19:00. Be mindful of these changes to protect yourself under the sun!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 8 | 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 | 8 | very high | 15 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 |
The UV Index experiences notable changes throughout the year, with peaks from March to September when the levels reach extreme (10-13), particularly in April and June. The highest risk months are March through September, where the burn time decreases to just 10 minutes during peak exposure. In contrast, January, December, and November present moderate to high exposure levels, allowing for longer burn times of up to 30 minutes. It is crucial for both visitors and residents to remain vigilant during the high-risk months by applying sunscreen, wearing protective clothing, and seeking shade, especially during midday hours when UV radiation is at its strongest.
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 |
| Green Valley | 5 | 7 | 10 | 12 | 12 | 13 | 12 | 12 | 11 | 9 | 6 | 5 |