Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Duncan, United States, where sunny days often bring beautiful weather but also increased risks for skin damage. Being aware of UV levels helps prevent sunburn and promotes long-term skin health, making it essential for outdoor enthusiasts and sunbathers alike. Duncan's BSk climate features a unique blend of dry air and sunny conditions that can lead to high UV exposure—especially during peak midday hours when the index soars to a maximum of 12. Stay informed and take the necessary precautions to enjoy the sun safely!
As the sun rises, the UV Index starts at a low 1 at 07:00, offering a safe environment for early risers. By 08:00, it edges up to 2, still remaining relatively mild. However, the tide begins to turn at 09:00 as it climbs to 3, marking the onset of more significant UV radiation. From 10:00 onward, the index surges dramatically, peaking at an intense 12 between 13:00 and 14:00—a critical window where sun protection becomes essential. After reaching its zenith, the UV levels begin a gradual decline, dropping to 10 at 15:00, and continuing to fall to just 1 by 19:00. This hourly data underscores the importance of vigilance during the midday hours when UV exposure is at its 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 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 10 | 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 |
Throughout the year, UV Index levels exhibit notable seasonal variations, peaking during the summer months. The highest risk for sun exposure occurs from March to September, with the UV Index reaching extreme levels of 11 to 13, necessitating minimal burn times of just 10 minutes. April, May, June, July, and August are particularly critical months, where it's essential for visitors and residents to take precautions such as wearing protective clothing, applying sunscreen, and seeking shade during midday hours. Conversely, January, February, and December present moderate to high levels of UV exposure, with longer burn times of 30 to 25 minutes. To ensure safety year-round, individuals are advised to stay informed about the UV Index and make sun-smart choices, especially during peak months.
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 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |
| Duncan | 5 | 7 | 10 | 11 | 12 | 13 | 12 | 12 | 11 | 8 | 6 | 4 |