Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Coalville, Utah, as it serves as a vital indicator of sun exposure and related health risks. With peak UV levels soaring to a striking 9 during midday hours, awareness of these numbers is paramount for preventing sunburn and preserving skin health. The Dfa climate prevalent in Coalville means that while summers can be warm and inviting, they also carry significant UV exposure risks. By keeping an eye on daily UV levels, you can take proactive steps to protect yourself, ensuring your time under the sun remains both enjoyable and safe.
The UV Index for the day showcases a notable rise in intensity as the sun climbs higher in the sky. Starting at a low of 1 at 7:00 AM, the index gradually increases to a moderate level of 3 by 9:00 AM. However, from 10:00 AM onward, things heat up significantly, peaking at a scorching 9 from noon to 2:00 PM. As the afternoon progresses, the UV Index gradually dips back to a friendly 3 by 5:00 PM, then descends further to 1 by the time evening sets in. This pattern underscores the importance of sun protection during peak hours, especially between 11:00 AM and 2:00 PM, when UV levels are at their highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 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 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index undergoes notable seasonal changes, with the highest levels typically occurring in the summer months. April signals the onset of increased UV radiation, peaking in June with an extreme UV Index of 11 and a burn time of just 10 minutes. The high-risk months for sun exposure are April to September, when values range from 8 to 11, indicating very high to extreme levels. Residents and visitors should be especially cautious during this period, taking proactive measures such as wearing sunscreen, sunglasses, and protective clothing, and seeking shade during peak sunlight hours. In contrast, the winter months of December and January present a moderate UV risk, but vigilance remains essential, as skin can still be affected by UV rays even when temperatures are cooler.
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 |
| Coalville | 3 | 5 | 5 | 8 | 9 | 11 | 10 | 9 | 8 | 6 | 3 | 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 |