Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Mount Vernon, United States, where sunlight can be both a source of joy and a potential health risk. With rising UV levels, awareness is key to preventing sunburn and protecting your skin from long-term damage. The climate in Mount Vernon, characterized as Cfa, offers diverse weather patterns but often leads to higher UV exposure, particularly during the hours of 10 AM to 2 PM. During these peak times, UV Index readings can soar as high as 10, making it imperative for locals to be vigilant and proactive in their sun safety practices. Protect your skin and enjoy the outdoors while staying informed!
The UV Index throughout the day showcases a dynamic pattern of sun exposure, peaking during the afternoon. At 07:00, the index starts low at 1, gradually increasing as the sun rises. By 10:00, it reaches 6, signaling a rise in sun intensity, culminating in a striking 10 from 12:00 to 13:00, indicating a high risk of harm from unprotected sun exposure. As the day progresses, the UV Index declines, dropping to 3 by 17:00, and steadily returning to 1 by 19:00. This data highlights the importance of sun protection, especially during midday when the UV Index is at its highest.
| 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 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 9 | 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 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal variations that are crucial for both residents and visitors to consider. From January to February, the UV Index remains in the moderate category (3-5) with a burn time of 30 minutes, indicating relatively lower risk. However, as spring approaches, March brings an increase to a high index of 7, necessitating caution with a reduced burn time of 25 minutes. The most critical months for UV exposure occur from April to June, where the index peaks at 11, categorized as extreme and resulting in a burn time of just 10 minutes. July and August maintain similar high levels, followed by a slight decline in September (9). As the year winds down, the UV risk lessens, with October returning to high levels (7) and burn time increasing to 25 minutes, before settling back to moderate levels by year’s end in November and December. Visitors and residents are advised to take extra precautions during the high-risk months of April to September, including using sunscreen, wearing protective clothing, and seeking shade, especially during peak hours.
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 | 5 | 7 | 10 | 11 | 11 | 10 | 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 |