Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Coulee Dam, United States, where the BSk climate brings unique sunshine patterns throughout the year. With peak UV levels reaching as high as 9 during midday hours, it's essential to be aware of UV exposure to prevent sunburn and promote overall skin health. By keeping tabs on the UV Index, Coulee Dam locals can make informed choices about outdoor activities, ensuring they protect themselves against harmful effects while enjoying the beautiful surroundings. Stay safe in the sun and learn how to effectively manage your UV exposure!
The UV Index for the day begins low at 1 by 7:00 AM, gradually rising as the sun climbs higher in the sky. By 9:00 AM, it reaches 4, marking a noticeable increase. The intensity peaks at 12:00 PM with a scorching 9, maintaining this high level until 14:00 PM. As the afternoon progresses, the index dips to 7 at 15:00 PM, and then continues its descent to 4 by 17:00 PM. The sun’s waning effects are apparent by the evening, with the UV Index dropping to 1 by 19:00 PM. This day highlights the importance of sun protection during peak hours when the index hits its maximum.
| 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 | 7 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 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, with high-risk months typically occurring from May to August, when the index peaks at 9, indicating very high exposure levels. During these months, a burn time of only 15 minutes is sufficient to cause skin damage, prompting visitors and residents to take precautions such as wearing sunscreen, hats, and protective clothing. Conversely, the winter months of January and December see low UV levels (index 2) with a burn time of 45 minutes, making outdoor activities less risky. February through April transition to moderate to high levels; thus, it's essential to remain vigilant and adjust sun protection habits accordingly. Always check the UV Index before heading outdoors, particularly in the summer months, to ensure safe and enjoyable outdoor experiences.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Coulee Dam | 2 | 4 | 5 | 6 | 8 | 9 | 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 |