Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Three Rivers, United States, where the climate typically features warm summers and ample sunlight. Being aware of UV levels can help you prevent sunburn and protect your skin health, which is particularly important during peak hours when the UV Index reaches its highest of 11 around midday. With UV radiation posing significant risks, including skin damage and increased risk of skin cancer, knowing when to seek shade or apply sunscreen is essential. In Three Rivers, where sunshine is abundant, staying informed about UV exposure is a key step in enjoying the outdoors safely.
As the sun rises, the UV Index begins its ascent, starting at a gentle 1 at 07:00 and 08:00. By 09:00, it registers a noticeable 2, but the real intensity kicks in at 10:00 with a jump to 5. The peak arrives between 12:00 and 14:00, where the index soars to a striking 10 and 11 respectively, reminding us to seek shade and protect our skin. Following this midday zenith, the index begins to decline, dropping to 7 by 16:00, and gradually tapering off towards 5 at 17:00. As evening approaches, the UV levels ease back to 2 at 18:00 and a mellow 1 by 19:00, signaling the end of the day’s sun-soaked intensity.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index indicates significant seasonal changes that affect sun exposure risks. January and December experience a moderate UV Index of 5, allowing for a burn time of 30 minutes, while November sees a high UV Index of 7, with a burn time of 25 minutes. The risk escalates sharply from February to April, reaching an extreme UV Index of 11 in both April and May, with a critical burn time of only 10 minutes. The most high-risk months are April, May, June, August, and September, where the UV Index peaks at 12 and remains at 11, necessitating vigilant sun protection measures. Visitors and residents are strongly advised to minimize sun exposure during peak hours and to use proper sun protection, such as sunscreen, hats, and protective clothing, particularly from February through September.
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 |
| Three Rivers | 5 | 8 | 9 | 11 | 11 | 12 | 11 | 12 | 11 | 9 | 7 | 5 |