Last updated: July 2, 2025
Understanding the UV Index in Llano, Texas is crucial for safeguarding your skin and overall health in this Cfa climate zone, where sunny days can lead to elevated UV levels. With mid-afternoon peaks reaching as high as 12, awareness of UV radiation is key to preventing sunburn and protecting yourself against long-term skin damage. Knowing these daily fluctuations helps residents and visitors alike make informed decisions to enjoy the outdoors safely, particularly during the summer months when exposure risks are greater. Stay informed and take proactive steps to shield yourself from harmful UV rays while basking in the beauty of Llano!
The UV Index throughout the day reveals a dramatic rise in sun exposure, peaking during the afternoon. Starting with a modest 1 at 07:00 and 08:00, the intensity gradually escalates, reaching 5 by 10:00. By 11:00, it jumps to a striking 7, and by noon, it explodes to a scorching 10. The hottest hours hit their zenith at 12:00 and 13:00, with a relentless 12, indicating high risk for unprotected skin. As the sun begins its descent, the index gradually declines, dropping to 10 by 15:00, then to 8 by 16:00. As the evening rolls in, the UV Index returns to a safer 5 at 17:00 and then gradually falls to 3 and 1 by 18:00 and 19:00, respectively. For outdoor enthusiasts, it’s essential to seek shade and apply sunscreen during those peak hours to enjoy the sun safely!
| 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 | 12 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index experiences significant fluctuations, peaking during the summer months. High-risk months for sun exposure are from March to August, where values reach extreme levels of 11 to 12, necessitating a burn time as low as 10 minutes. Visitors and residents should exercise caution, especially in these months, ensuring they apply sunscreen frequently, seek shade, and wear protective clothing. As the seasons transition, September and October still show elevated levels at 10 and 8, respectively, marking them as considerable months for UV exposure. It’s advised to remain vigilant even in the cooler months; while January and December pose a lower risk with UV Index levels of 5 and 4, adopting sun safety practices year-round is crucial for skin protection.
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 |
| Llano | 5 | 7 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 8 | 6 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |