Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Heart Butte, United States, as it plays a vital role in sunburn prevention and maintaining skin health. The varying UV levels throughout the day highlight the need for awareness, particularly during peak hours when the index reaches a maximum of 9 between 1 PM and 2 PM. Heart Butte's Dfb climate brings distinct seasonal variations, but elevated UV exposure risks persist, reminding us to protect our skin year-round. Stay informed and enjoy the outdoors safely by monitoring the UV Index!
The UV Index experience unfolds dramatically throughout the day, starting with a gentle maximum of 1 at 7:00 AM. As the sun climbs higher, the intensity increases, reaching 2 by 8:00 AM, and then surging to 3 at 9:00 AM. The peaks of the day occur around midday, with the index soaring to a robust 8 at 12:00 PM and hitting its highest point at 9 during both 1:00 PM and 2:00 PM. A gradual decline follows, where the UVI falls to 7 by 3:00 PM, then takes a further dip to 4 at 5:00 PM. As evening approaches, the UV levels taper off, settling back to a safe 2 by 6:00 PM and finally returning to a mild 1 by 7:00 PM. Stay protected during peak hours, particularly between 11:00 AM and 2:00 PM, when the sun's rays are most intense!
| 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 | 4 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 8 | 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 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV exposure varies significantly, with the highest risk months occurring from April to August, where the UV Index consistently reaches 9, classifying it as very high. During these months, the burn time is a mere 15 minutes, emphasizing the need for caution. As winter approaches, the UV Index decreases, dropping to 2 in January and December, indicating a low risk of UV exposure, while February and March see moderate levels with indices of 4 and 5, respectively. Visitors and residents should prioritize protective measures such as using sunscreen, wearing protective clothing, and seeking shade, especially in the spring and summer months, when the sun's intensity is at its peak. Staying informed and alert can help mitigate the risks associated with UV exposure year-round.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Heart Butte | 2 | 4 | 5 | 8 | 9 | 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 |