Last updated: May 3, 2025
In Glen Ullin, United States, awareness of the UV Index is crucial for maintaining skin health and preventing sunburn. Understanding local UV levels helps residents and visitors make informed choices about sun protection, especially given the region's Dfb climate, which can expose individuals to significant UV radiation during peak hours. With the UV Index reaching a maximum of 8 from 1 PM to 3 PM, the risks of overexposure are heightened. Staying informed empowers the community to enjoy the outdoors safely while protecting their skin from harmful effects.
As the sun rises, the UV Index begins its ascent with low levels of 1 at both 7:00 and 8:00 AM, making it a safe time for early risers. By 9:00 AM, it climbs to 2, nudging closer to moderate levels. The heat intensifies through the morning, peaking at 12:00 PM with a notable 7, indicating a heightened risk for sun exposure. The afternoon sees the index reach its maximum of 8 between 1:00 PM and 3:00 PM, where sun protection becomes essential. As the day cools, the UV Index gradually decreases, dropping to 4 by 5:00 PM and tapering off to 1 by 7:00 PM, winding down an eventful day under the sun. Remember to stay sun-smart during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences notable seasonal changes, with peak levels occurring in the summer months. April through August are high-risk months, characterized by very high UV exposure (Index 9-10) with a burn time as short as 15 minutes. As temperatures rise, residents and visitors are advised to take precautions: wear sunscreen, protective clothing, and seek shade when outdoors, especially during midday hours. In contrast, the UV Index is low in January and December (Index 2), allowing for longer exposure times of 45 minutes without significant risk. During the transition months of February and March, moderate levels (Index 4-5) highlight the importance of vigilance as burn times decrease to 30 minutes. Ultimately, awareness of these seasonal UV changes is crucial for minimizing health risks while enjoying outdoor activities year-round.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Glen Ullin | 2 | 4 | 5 | 9 | 8 | 10 | 9 | 9 | 7 | 5 | 3 | 2 |
| 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 |