Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Hammond, United States, where the humid subtropical climate (Cfa) leads to significant sun exposure, especially during the warmer months. Awareness of UV levels can make a substantial difference in preventing sunburn and protecting skin health, as even moderate UV indices can pose risks, particularly during peak hours like noon to 2 PM when levels soar to 11 and 12. As you step outside into Hammond's bright sunshine, remember that being informed about UV risks can help you enjoy the outdoors safely while keeping your skin protected.
As the sun rises, the UV Index begins its dramatic ascent, starting at a mild 1 at 07:00 and gradually increasing throughout the morning. By 09:00, it reaches a more noticeable 4, and at 10:00, it hits 6. The real intensity arrives at 12:00, peaking at a scorching 11, followed closely by 12 at 13:00, making noon the most critical time for sun safety. As afternoon slips into evening, the index steadily declines, showcasing 11 at 14:00, before tapering off to 3 by 17:00 and returning to a safe 1 by 18:00. From morning’s cautious rays to the afternoon's blazing sun, this day exemplifies the need for sun protection during its peak hours!
| 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 | 11 | extreme | 10 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index levels fluctuate significantly, indicating varying levels of sun exposure risk. The high-risk months typically span from February to September, with the UV Index peaking at 12 in June, characterized as extreme exposure, necessitating a burn time of only 10 minutes. Both April and May also report an extreme index of 11, reinforcing the need for caution. From October to November, the risk diminishes to very high and high levels, respectively, allowing for more manageable exposure times of 15 to 25 minutes. Visitors and residents are advised to take appropriate precautions during the peak months by wearing protective clothing, using sunscreen, and seeking shade, particularly during midday hours when UV radiation is strongest. Staying informed and vigilant about UV levels can help prevent skin damage and promote safer outdoor activities year-round.
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 |
| Hammond | 5 | 8 | 9 | 11 | 11 | 12 | 11 | 11 | 10 | 9 | 6 | 5 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |