Last updated: May 3, 2025
Understanding the UV Index in Greenleaf, United States is essential for safeguarding your skin health and preventing sunburn. With the region's BSk climate, residents and visitors experience varying UV exposure, particularly from late mornings to early afternoons when levels can soar to dangerous heights, reaching up to 10. By keeping an eye on the UV Index, you can take necessary precautions to protect yourself from harmful rays, ensuring your outdoor activities remain enjoyable and safe year-round. Protect your skin and enjoy the beautiful days ahead!
As the sun rises, the UV Index begins to climb, starting at a gentle 1 at 7:00 AM and remaining steady through 8:00 AM. By 9:00 AM, it nudges up to 2, but as the day progresses, the intensity skyrockets. At 10:00 AM, it hits 4, and by midday, the UV Index soars to a peak of 10 at both 1:00 PM and 2:00 PM—a clear indication to seek shade and wear sunscreen. After this peak, it gradually dips to 9 by 3:00 PM, continuing its descent to 5 at 5:00 PM, and finally, the UV levels soften to 1 as evening falls at 7:00 PM. This day exemplifies the sun's potent rays, reminding us to stay vigilant during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index shows significant variability, peaking during the summer months. High-risk months, characterized by a UV index of 8 or above, include April through September, with the highest levels occurring in June (UV Index 11) and May (UV Index 10), both categorized as extreme and very high, respectively. During these months, the recommended burn time decreases significantly, with only 10-15 minutes of unprotected exposure being safe. Consequently, it is crucial for visitors and residents to take precautionary measures in these months—wearing sunscreen, protective clothing, and seeking shade during peak hours can help mitigate the risks of overexposure. In contrast, the winter months of January, February, and December feature moderate to low UV levels, with longer safe exposure times of 30-45 minutes. However, even during these cooler months, it’s advised to remain vigilant about UV protection, particularly on sunny days.
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 |
| Greenleaf | 3 | 4 | 6 | 8 | 10 | 11 | 10 | 9 | 8 | 5 | 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 |