Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Willow, United States, given its significant impact on sunburn prevention and skin health. As a part of the Dfc climate zone, Willow experiences varying levels of UV radiation, particularly peaking between 10 AM and 3 PM when the index can reach as high as 6. With these levels, being informed about UV exposure can help you protect yourself and your loved ones from harmful effects while enjoying the beautiful outdoors. Empower yourself with knowledge to make safe choices under the sun!
The UV Index for the day presents a dynamic landscape of sun exposure, beginning gently at 1 in the early hours, perfect for those taking a leisurely morning stroll. As the sun climbs higher, the intensity escalates, peaking at 6 between 1:00 PM and 3:00 PM—ideal for sun-seekers who enjoy it hot! Attendees at outdoor activities should take precautionary measures during this window, such as applying sunscreen and wearing protective clothing. As afternoon transitions to evening, the UV Index gradually tapers off, settling back to a more manageable 2 by 7:00 PM. Remember, moderation is key to enjoying the sun 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 | 3 | moderate | 30 min |
| 11:00 | 4 | moderate | 30 min |
| 12:00 | 5 | moderate | 30 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, UV levels show significant seasonal variation, with January to February having a low UV Index of 1, allowing for 45 minutes of safe sun exposure. As spring approaches, March to April sees an increase in UV levels to 3, categorized as moderate, with a burn time of 30 minutes. This trend continues into May with a moderate UV Index of 5, and shifts to high in June and July, both carrying a UV Index of 6 and a reduced burn time of 25 minutes—these are considered high-risk months for UV exposure. In August, the UV Index decreases to 5, followed by a slight drop to 4 in September, indicating moderate risk once again, with a burn time back at 30 minutes. The year ends with low UV levels in October through December, each with a UV Index of 1 or 2, and a comfortable burn time of 45 minutes. Visitors and residents should shield themselves during the higher UV Index months, particularly from June to August, by wearing protective clothing, sunscreen, and limiting exposure during peak sun hours to reduce the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Willow | 1 | 1 | 3 | 3 | 5 | 6 | 6 | 5 | 4 | 2 | 1 | 1 |
| 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 |