Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Saint Ignatius, where the sun's rays can be particularly intense, especially during peak hours. By being aware of varying UV levels, you can effectively prevent sunburn and protect your skin health, reducing the risk of long-term damage. With a Dfb climate that presents unique exposure risks, particularly between 11 AM and 3 PM when the UV Index peaks at 10, it’s essential for locals to stay informed and take proactive precautions against harmful ultraviolet radiation. Stay protected and enjoy the sunshine safely!
As the sun rises, the UV Index starts off low, hitting just 1 by 07:00 and maintaining that level through 08:00. However, as the morning progresses, anticipation builds with a steady climb to 3 by 09:00 and peaking at a noteworthy 5 by 10:00. The intensity escalates sharply, reaching a maximum of 10 between 13:00 and 14:00, indicating a significant risk for unprotected skin. Gradually, the UV Index begins to decline, dropping back to 9 at 15:00 and easing down to 5, 3, and finally 2 as the day winds down through 17:00 to 19:00. A day to remember for sun seekers, but remember to apply that sunscreen during peak hours!
| 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 | 7 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, UV exposure varies significantly. January and December typically present a low risk with a UV Index of 2, allowing for about 45 minutes of sun exposure before burning. As spring approaches, February jumps to a moderate level (UV Index 4), indicating a burn time of 30 minutes. March and April see a rise to high UV levels (Index 6 and 7), with burn times decreasing to 25 minutes. The summer months, particularly May through August, are the most critical, marked by very high UV Index readings of 9 to 10, necessitating a mere 15 minutes of exposure before risking sunburn. September remains very high at UV Index 8 but provides a slightly extended burn time of 15 minutes. As temperatures cool, October and November return to a moderate category (UV Index 3 to 5), allowing 30 minutes of safer sunlight exposure. Residents and visitors alike should remain vigilant during the high-risk months of May to September, practicing sun safety by seeking shade, wearing protective clothing, and applying sunscreen regularly to reduce skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Saint Ignatius | 2 | 4 | 6 | 7 | 9 | 10 | 10 | 9 | 8 | 5 | 3 | 2 |
| 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 |