Last updated: May 3, 2025
Understanding the UV Index is crucial for maintaining skin health in Marshall, United States. As the UV levels fluctuate throughout the day, being aware of these changes can help you take essential precautions against sunburn and long-term skin damage. With a Dfa climate, Marshall experiences varied UV exposure, especially during peak hours between 10 AM and 2 PM, when the index often reaches levels 8 and 9. By monitoring the UV Index and understanding its implications, you can better protect yourself and enjoy the outdoors safely!
The UV Index today shows a dynamic rise and fall throughout the hours, peaking in the midday sun. Starting from a gentle 1 at 07:00, it gradually climbs to reach 8 by 12:00, just before the sun reaches its zenith. The intensity spikes to its highest point of 9 at 13:00, remaining high until 14:00, when it begins to taper off. By 15:00, it drops to 7, continuing its downward trend to 4 by 17:00, and then easing back to the safer 1 by 19:00. Remember to protect yourself during the peak hours, especially between 11:00 and 14:00, when the sun’s rays are strongest!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal variation, with the highest levels occurring during the late spring and summer months. April marks the start of this high-risk season with a UV Index of 8, classified as very high with a burn time of just 15 minutes. This peak intensity continues through June when the UV Index reaches 10, before slightly decreasing in September. Notably, May, June, July, and August are critical months where the UV Index remains consistently at 9 or 10, posing a considerable risk for sunburn and skin damage. As a precaution, visitors and residents are strongly advised to protect themselves during these months by seeking shade, wearing protective clothing, and applying sunscreen, particularly during peak sun hours. In contrast, the UV Index significantly drops in the fall and winter, with January, February, and March presenting moderate risks, and December experiencing a low UV index, making sun protection less critical during that time.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Marshall | 3 | 5 | 5 | 8 | 9 | 10 | 9 | 9 | 8 | 5 | 3 | 2 |
| 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 |