Last updated: June 2, 2025
Understanding the UV Index in Saint Jacob, United States, is crucial for protecting your skin and overall health. With the region's Cfa climate, characterized by warm summers and varying UV exposure throughout the day, awareness of UV levels can help prevent sunburn and long-term skin damage. During peak hours, especially between 10 AM and 2 PM, UV Index values can soar to 11, indicating a very high risk of harm from unprotected sun exposure. By staying informed about the UV Index, you can enjoy the sunny days while safeguarding your skin's health and well-being.
The UV Index steadily climbs as the day progresses, starting from a mild 1 at 7:00 AM and reaching a peak of 11 by 1:00 PM. Sun-seekers and outdoor enthusiasts should be mindful, as the index hits a high of 10 at 12:00 PM, signaling significant UV exposure. After this peak, the index gradually decreases, dropping to 8 by 3:00 PM, and continuing to decline to 1 by 7:00 PM. For safe sun enjoyment, it’s best to take precautions during those high UV hours, particularly between 11:00 AM and 2:00 PM. Remember to sport your hats and sunscreen!
| 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 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV levels fluctuate, with significant increases during the spring and summer months. January and December have moderate UV Index levels of 3, allowing for 30 minutes of unprotected sun exposure, while February sees a slight increase to 5. As spring arrives, March reaches a high UV Index of 6 with a 25-minute burn time, transitioning to very high levels of 9 in April and peaking at 11 in June—the highest risk month with only 10 minutes of safe exposure. July and August maintain a very high UV Index of 10 and 9, respectively, before gradually declining to 6 in October and returning to moderate levels in November. For visitors and residents, it is crucial to take extra precautions from April through September, particularly in June, by wearing protective clothing, using sunscreen, and seeking shade during peak hours to minimize the risk of harmful UV exposure.
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 |
| Saint Jacob | 3 | 5 | 6 | 9 | 10 | 11 | 10 | 9 | 9 | 6 | 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 |