Last updated: August 1, 2025
Understanding the UV Index in Sainte Genevieve, United States, is crucial for safeguarding your skin and overall health under the sun. As a visitor or resident in this Cfa climate zone, it's important to recognize the varying levels of ultraviolet radiation throughout the day. With UV levels peaking at 11 around midday, awareness can help prevent sunburn and long-term skin damage. Don't underestimate the risks—even moderate exposure can lead to significant health concerns. Whether you're exploring the charming streets or enjoying the outdoors, knowing the UV Index can empower you to make informed choices and enjoy your time in the sun safely.
The UV Index for today starts off mild, peaking at 1 by 7:00 AM, then gradually increases as the sun climbs higher in the sky. By 10:00 AM, it hits 6, indicating a moderate level of UV exposure. The intensity keeps climbing, reaching a maximum of 11 at 1:00 PM, making this the most crucial time for sun safety. As the afternoon progresses, the index begins to wane, dropping to 8 by 3:00 PM, then further to 2 by the evening, signalling a return to a safer UV environment. Remember, protecting your skin is vital during those peak hours of 10 AM to 2 PM!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | 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 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index experiences significant fluctuations, indicating varying levels of sun exposure risk for visitors and residents. From January to February, the UV Index ranges from 3 to 5, categorized as moderate, allowing for a relatively safe burn time of 30 minutes. As spring approaches in March, the index rises to 7 (high), with a burn time decreasing to 25 minutes. The most critical months for sun exposure are April to July, where the UV Index peaks at 11, classified as extreme, resulting in a burn time of only 10 minutes. In August and September, the risk remains high, with indexes at 10 and 9, respectively; however, burn times slightly increase to 15 minutes. As temperatures cool in October through December, the UV Index returns to moderate levels, minimizing the burn time back to 30 minutes by year-end. Visitors and residents are advised to take extra precautions during the high-risk months of April through July, such as wearing protective clothing, using sunscreen, and limiting sun exposure during peak hours to mitigate the risk of sunburn and 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 |
| Sainte Genevieve | 3 | 5 | 7 | 9 | 11 | 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 |