Last updated: May 3, 2025
Understanding the UV Index is essential for residents of Westcliffe, United States, where the high-altitude climate presents unique exposure risks. With UV levels peaking around midday, reaching a maximum of 13, being aware of these fluctuations can help protect your skin from harmful sunburns and long-term health issues. The BSk climate—characterized by cool temperatures and strong sunlight—means that even on cloudy days, UV rays can lead to significant skin damage. By keeping an eye on the UV Index, you can enjoy the beautiful outdoors while safeguarding your skin’s health.
The UV Index throughout the day peaks dramatically as the sun rises higher in the sky. Starting at a low of 1 at 07:00, it gradually climbs to a moderate level of 2 by 08:00. As the clock ticks toward mid-morning, the intensity ramps up, reaching 5 by 09:00, and surges to a high of 10 at 11:00. The afternoon sees the UV Index skyrocket to its maximum of 13 at 13:00, offering the most significant risk for sun exposure. However, as the day progresses, the index drops, signaling a safer environment for outdoor activities, settling back to 4 by 17:00 and tapering off to a low of 1 by 19:00. It’s wise to plan your sun exposure around these crucial hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 12 | 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, the UV Index exhibits significant seasonal changes, peaking during the summer months. The highest risk for sunburn occurs from March to August, where the UV Index reaches extreme levels of 12 to 13 and the burn time shortens to just 10 minutes. Specifically, April, May, June, and July are critical months to be cautious, with April and May showcasing the highest UV readings. Visitors and residents are advised to take protective measures during these high-risk months by wearing sunscreen, seeking shade, and donning protective clothing, especially between 10 AM and 4 PM when the sun's rays are strongest. In contrast, January, November, and December present a lower risk with moderate UV levels, allowing for safer outdoor activities with less sun protection required.
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 |
| Westcliffe | 4 | 7 | 10 | 12 | 13 | 13 | 13 | 12 | 10 | 7 | 5 | 4 |