Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Arapahoe, United States, where the sun can be both a friend and a foe. With UV levels peaking at an intense 11 during midday, awareness of these values is essential for preventing sunburn and protecting skin health. The local Dfa climate means clear, sunny days that could lead to higher UV exposure, particularly in the summer months. By staying informed about the UV Index, you can enjoy the outdoors safely while minimizing the risk of harmful effects from the sun.
The UV Index today paints a vivid picture of the sun's intensity as it rises to its peak around midday. Starting off gently at 1 by 07:00 and 08:00, the sun begins to assert itself, climbing to 3 by 09:00. As the clock strikes 10:00, the UV index soars to 5, and by 11:00, it surges to 7. The real heat hits around noon, with 12:00 witnessing a striking 9 before peaking at 11 from 13:00 to 14:00—ideal conditions for sunbathers and outdoor enthusiasts. However, as the day progresses, the UV levels start to dip; by 15:00, it settles at 10, then recedes to 8 by 16:00. Finally, as evening approaches, the index drops to 5 at 17:00, 3 at 18:00, and returns to a mild 1 by 19:00. It’s a day to embrace the sun early, but don’t forget the sunscreen as the UV rays reach their zenith!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | 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 | 11 | extreme | 10 min |
| 14:00 | 11 | 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, UV exposure varies significantly, with high-risk months typically occurring from March to September. During these months, particularly in April through July, the UV index reaches notably high levels, peaking at 11, which indicates extreme exposure risks and a quick burn time of just 10 minutes. As the seasons shift, visitors and residents should be particularly vigilant from May to August, when protective measures such as sunscreen, hats, and seeking shade are essential to prevent skin damage. In contrast, January, November, and December present a moderate UV index of 3-4, allowing for longer burn times of 30 minutes, though sunscreen should still be applied. Staying informed about these UV changes can help ensure safe outdoor activities year-round.
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 |
| Arapahoe | 3 | 5 | 7 | 9 | 10 | 11 | 11 | 10 | 9 | 6 | 4 | 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 |