Last updated: July 2, 2025
Understanding the UV Index in Arapahoe, United States is crucial for protecting your skin and overall health. With UV levels peaking at 11 around noon, awareness becomes essential for preventing sunburn and long-term skin damage. The semi-arid BSk climate of Arapahoe means that while sunshine is abundant, so are the risks associated with high UV exposure. By staying informed about UV levels, you can enjoy the outdoors safely while taking the necessary precautions to safeguard your skin health. Remember, even low UV Index readings require some sun safety measures; knowledge is your best defense against harmful rays!
At dawn, the UV Index starts off gentle, peaking at 1 by 7:00 AM. As the sun climbs higher, the index rises steadily, hitting 2 by 8:00 AM, then surging to 4 at 9:00 AM. The intensity escalates, reaching a robust 6 by 10:00 AM, and striking its peak at 10 by noon. The highest values occur between 1:00 PM and 2:00 PM, where it boldly stands at 11. As the afternoon progresses, the index begins to wane, falling to 9 at 3:00 PM, then dropping further to 7 by 4:00 PM. By 5:00 PM, the UV Index returns to a more manageable 4, before tapering off to 2 at 6:00 PM and concluding at 1 by 7:00 PM. It's essential to stay protected during those peak hours for safe sun exposure!
| 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 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 9 | 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 |
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 |