Last updated: June 2, 2025
In San Luis, United States, understanding the UV Index is crucial for protecting your skin and overall health. The UV Index provides a forecast of the likelihood of harm from unprotected sun exposure, helping you take proactive measures against issues like sunburn and long-term skin damage. With a BSk climate characterized by high temperatures and strong sunlight, San Luis presents unique UV exposure risks, particularly during peak hours when the index can soar to 12 or even 13 between 12 PM and 1 PM. Be informed and take necessary precautions to enjoy the sun safely!
The UV Index displays a dynamic pattern throughout the day, starting off with a mild 1 at 07:00 and gradually climbing as the sun rises. By 09:00, it reaches a moderate level of 5, but the sun really starts to shine by 11:00, peaking at an intense 12. The apex is reached at 13:00 with an impressive 13, indicating it’s crucial to take sun safety precautions. As the afternoon progresses, the index begins to decline, dropping back to 10 by 15:00 and continuing to cool down into the evening, finally settling back to 1 by 19:00. It’s a vivid reminder of how important it is to stay protected during the peak sun hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV exposure varies significantly, with the highest risk typically occurring from March to September. During this period, the UV Index reaches extreme levels, peaking at 13 in June and July, which correlates with a dangerously short burn time of just 10 minutes. Visitors and residents should take extra precautions during these months, applying sunscreen, wearing protective clothing, and seeking shade during peak sunlight hours. In contrast, January, November, and December present much lower risks, with a UV Index of 4 to 5, allowing for more leisurely outdoor activities while still practicing some sun safety. Stay informed, plan accordingly, and enjoy the sun responsibly!
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 |
| 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 |
| San Luis | 4 | 7 | 10 | 11 | 12 | 13 | 13 | 12 | 11 | 8 | 5 | 4 |