Last updated: July 2, 2025
In Longtown, United States, awareness of the UV Index is crucial for safeguarding your skin from harmful sun exposure. Understanding UV levels is key to preventing painful sunburns and promoting long-term skin health. With a Cfa climate, residents often experience high UV exposure, particularly during midday when the index spikes to levels of 10 and 11. Keeping an eye on the daily UV forecast empowers you to enjoy the outdoors safely, ensuring you take the necessary precautions to protect your skin while soaking up the beautiful sunshine of Longtown.
The UV Index for the day showcases a striking pattern, starting moderate at 7:00 AM with a value of 1. As the sun climbs higher, the index steadily rises, hitting 3 by 9:00 AM, and then surging to a peak of 11 between 1:00 PM and 2:00 PM. This indicates a high risk of harm from unprotected sun exposure during midday. Following the peak, the UV Index gradually declines to 4 by 5:00 PM and further decreases to 1 by 7:00 PM, emphasizing the critical importance of sun protection during the intense midday hours. It’s advisable to seek shade and wear sunscreen if you're outside during the peak period!
| 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 | 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 |
As the seasons change, so do the levels of ultraviolet (UV) radiation, significantly impacting exposure risk for visitors and residents. From January to March, UV Index values gradually increase from 4 (moderate) in January to 7 (high) in March, with burn times decreasing from 30 minutes to 25 minutes. The real concern arises in April and May, when the UV Index peaks at 10 (very high) and burn times shrink to just 15 minutes. The summer months of June, July, and August pose the greatest risk, showcasing an extreme UV Index of 11, allowing only a 10-minute exposure before burn. As fall arrives, September sees a slight reduction to 9 (very high) before tapering off to 7 in October, while burn times increase back to 25 minutes. By November and December, the index lowers to 5 and 4 (both moderate) with burn times returning to 30 minutes. Visitors and residents should take precautions during the high-risk months of April through August, such as wearing sunscreen, protective clothing, and seeking shade, to minimize the risk of harmful UV exposure.
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 |
| Longtown | 4 | 6 | 7 | 10 | 10 | 11 | 11 | 11 | 9 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |