Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Burlington, United States, where UV exposure can vary significantly throughout the day. Being aware of UV levels helps in preventing sunburn and maintaining skin health, especially during peak hours when the index reaches as high as 9. Burlington’s Dfb climate presents unique challenges, with sunny days that can bring increased risk of UV radiation. Stay informed to protect yourself and enjoy the outdoors safely!
This hour-by-hour UV Index data paints a clear picture of sun intensity throughout the day. At 07:00 and 08:00, the UV Index remains low at just 1, making it safe for outdoor activities. However, as the clock ticks toward mid-morning, the value climbs to 2 by 09:00. The sun's power peaks between 12:00 and 14:00, with a striking 8 and 9 respectively, indicating a high risk of harm from unprotected sun exposure. By 15:00, the index begins to decrease, dipping to 8, and continues its descent through the late afternoon and evening, reaching 5 at 17:00 and down to 2 by 19:00. Remember, during those mid-day hours, proper sun protection is essential to enjoy the outdoors safely!
| 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 | 9 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
As the seasons change, UV levels fluctuate significantly, necessitating varying precautions for residents and visitors. January through March sees lower UV indices (2 to 5), with longer burn times of 30-45 minutes, classified as low to moderate exposure. April to August, however, presents high-risk months, with UV indices spiking to 9 during April, June, and July, meaning exposure should be limited to 15 minutes to avoid burns. September brings a slight decrease to a UV Index of 7 (high exposure), allowing for a burn time of 25 minutes. As we transition into October through December, UV levels drop back to low levels (2 to 4), allowing for safer outdoor activity with burn times extending back to 30-45 minutes. Visitors and residents should prioritize skin protection during the high-risk months, employing sunscreen, protective clothing, and shade, especially from April to August, while enjoying the outdoors in the cooler months with more confidence.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Burlington | 2 | 4 | 5 | 9 | 8 | 9 | 9 | 8 | 7 | 4 | 2 | 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 |