Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Round Rock, Texas, where the climate is characterized by hot, dry summers under a BSk climate zone. Being aware of UV levels can help you protect your skin from harmful effects such as sunburn and long-term health issues like skin cancer. With midday UV Index values soaring to 11 and 12, it’s essential to take precautions during peak hours to ensure skin health and overall well-being. Stay informed and keep your skin safe while enjoying the Texas sun!
Today’s UV Index chart presents a clear peak in solar intensity, reaching 12 at 1:00 PM—the prime time for sun exposure. Starting from a gentle 1 at 7:00 AM, the index gradually climbs to a moderate 4 by 9:00 AM. As the day progresses, the index spikes dramatically, hitting 11 between 12:00 PM and 2:00 PM, signaling high UV radiation levels. Even as afternoon approaches, UV levels remain significant at 10 by 3:00 PM, before tapering off to 4 at 5:00 PM and returning to safer levels of 1 by 7:00 PM. For those venturing outside, it’s essential to prioritize sun safety during peak hours, especially between 10:00 AM and 2:00 PM. Stay sun savvy! ☀️
| 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 | 11 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 11 | 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 |
The UV Index shows a distinct seasonal pattern, with the highest levels occurring from April to September, when the index consistently reaches extreme levels (11-13) and the burn time drops to just 10 minutes. The high-risk months for UV exposure are March through September, particularly April through July, when precautions are crucial. Visitors and residents should take protective measures during these months, such as wearing sunscreen, protective clothing, and sunglasses, and seeking shade to minimize the risk of harmful skin exposure. As the year progresses towards October, UV levels decrease, but attention to UV protection remains important until the levels return to moderate in December and January.
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 |
| Round Rock | 4 | 7 | 9 | 11 | 12 | 13 | 13 | 12 | 11 | 8 | 6 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |