Last updated: July 2, 2025
Staying informed about the UV Index is crucial for residents of Mount Vernon, where the climate offers a mix of sunny days and overcast skies. Understanding UV levels is essential not just for preventing painful sunburns but also for safeguarding long-term skin health. With peak UV levels reaching as high as 11 during midday, the risks associated with sun exposure are significant, especially in a temperate climate like ours. Be proactive about your skin's protection and make informed decisions when enjoying the outdoors in Mount Vernon.
The UV Index (UVI) paints a clear picture of sun intensity throughout the day. Beginning at 07:00, the index registers a low 1, making it a safe time for early risers. As the sun climbs higher, the numbers take a dramatic turn: by 11:00, the UVI jumps to 7, signaling increased sun exposure. The peak occurs between 12:00 and 14:00, where it reaches an intense 11, urging caution for outdoor activities. The intensity gradually wanes after this peak, dropping to 5 by 17:00 and returning to a mild 1 once again by 19:00. Whether planning your day or heading outdoors, it's crucial to stay sun-smart 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 | 7 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 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, UV Index levels fluctuate significantly, with higher risks typically observed from March to August. The high-risk months are especially highlighted in April, May, June, July, and August, where the UV Index reaches extreme levels of 11 and the recommended burn times drop to just 10 minutes. Visitors and residents are strongly advised to take protective measures during these months, such as wearing sunscreen, protective clothing, and seeking shade, particularly during midday hours. As the year progresses towards the fall and winter months, UV exposure decreases, making January and December months of moderate risk, where burn times are longer at 30 minutes. Staying informed about daily UV levels can help ensure safety while enjoying outdoor activities.
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 |
| Mount Vernon | 3 | 6 | 7 | 9 | 11 | 11 | 11 | 10 | 9 | 7 | 5 | 3 |
| 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 |