Last updated: August 1, 2025
Understanding the UV Index is crucial for residents of McGill, United States, where the BSk climate can lead to significant UV exposure, especially during peak hours. With UV levels reaching a maximum of 12 at midday, awareness of these fluctuations is vital for sunburn prevention and overall skin health. High UV levels pose risks for everyone, making it essential to protect yourself with appropriate measures like sunscreen and clothing. By staying informed about the UV Index, you can enjoy the sunny days while safeguarding your skin from potential damage.
The UV Index today started off gently, peaking at 1 by 7:00 AM, perfect for an early morning stroll. As the sun ascended, the intensity rose steadily, reaching a moderate 3 by 8:00 AM and climbing to 5 by 9:00 AM. The sun was in full effect by 10:00 AM, with the UV Index soaring to 8. This intensity was just a prelude to the day’s zenith at 12:00 PM, where it hit a blistering 12—a clear indicator to seek shade and protect your skin. This extreme level lingered until 1:00 PM, before tapering off gradually. By 3:00 PM, it had decreased to 9, continuing a steady decline to 6 by 4:00 PM. As the evening approached, the UV Index dipped further, dropping to 3 at 5:00 PM and winding down to a cool 1 by 7:00 PM, signaling the close of a sun-drenched day.
| 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 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | 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 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index displays significant seasonal variations. The high-risk months, characterized by extreme UV levels and minimal burn times, are May through August, with June and July reaching a peak UV Index of 12 and an urgent burn time of just 10 minutes. As spring transitions to summer, the UV Index escalates from a moderate level of 4 in January to an extreme of 11 in May, then gradually declines again in fall and winter. Visitors and residents are advised to take precautions during these high-risk months, such as seeking shade, wearing protective clothing, and applying broad-spectrum sunscreen to minimize the risks of skin damage from UV exposure. In contrast, during the moderate months of November and December, exposure is less critical, but protective measures are still recommended. Stay informed and protect your skin 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 |
| McGill | 4 | 6 | 8 | 10 | 11 | 12 | 12 | 11 | 10 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |