Last updated: May 3, 2025
In Danville, United States, awareness of the UV Index is crucial for protecting your skin and maintaining overall health. Understanding UV levels not only helps prevent painful sunburns but also plays a key role in reducing long-term risks of skin damage and cancer. Given Danville's Cfa climate, characterized by warm summers and moderate UV exposure, the risk of high UV levels peaks around midday, with values reaching 10 during the summer months. Stay informed and take necessary precautions to enjoy the sun safely while preserving your skin’s health!
During the day, the UV Index fluctuates, providing a clear picture of sunlight intensity. Morning hours see a gentle rise, with values peaking at 1 from 7:00 AM to 8:00 AM, making it a safe time for outdoor activities. However, as the sun climbs higher, the index sharply escalates, hitting 3 by 9:00 AM and jumping to an intense 7 by 11:00 AM. The hottest moment arrives at 1:00 PM and 2:00 PM, where it reaches a peak of 10, indicating a high risk of harm from unprotected sun exposure. The intensity begins to wane in the afternoon, dipping to 6 at 4:00 PM and gradually descending to 1 by 7:00 PM, suggesting that early morning and late evening are the most favorable times to bask in the sun safely.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, so do the UV Index levels, which pose varying risks for sun exposure. January and December maintain moderate UV levels (3), allowing for a burn time of 30 minutes, while February sees a slight increase to 5. March marks the onset of higher risks with a UV index of 7, categorized as high, and a reduced burn time of 25 minutes. The months of April and May reach an alarming UV index of 10, labeled as very high, where burn time drops to just 15 minutes. The peak of danger occurs during June and July, with an extreme UV index of 11, demanding caution with an even shorter burn time of 10 minutes. August and September continue to present significant risks, both at a UV index of 10 and 9, respectively. As the year winds down, October sees a decrease to a high level of 7, while November and December return to moderate levels. Visitors and residents should prioritize sun protection during the high-risk months of March through September, especially during the peak summer months of June and July, by wearing sunscreen, protective clothing, and seeking shade during peak hours to prevent skin damage.
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 |
| Danville | 3 | 5 | 7 | 10 | 10 | 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 |