Last updated: June 2, 2025
In Powell, United States, being aware of the UV Index is essential for safeguarding your skin against harmful ultraviolet rays. Understanding the UV levels during the day can help you take proactive measures to prevent sunburn and maintain healthy skin, especially during the peak hours when the UV Index reaches as high as 11 around midday. Powell’s BSk climate presents unique challenges, with sunny days that can unexpectedly ramp up UV exposure risks. Stay informed and protect yourself while enjoying the beautiful outdoors!
The UV Index readings reveal a dynamic pattern throughout the day, peaking sharply at 12 PM with an intense value of 10, indicating a high risk for harm from unprotected sun exposure. As the sun climbs higher, it reaches a maximum of 11 between 1 PM and 2 PM, urging outdoor enthusiasts to seek shade and apply sunscreen diligently. The morning starts off gently, with a minimum of 1 at 7 AM, gradually building to a moderate 4 by 9 AM. After noon, the index begins to wane, declining to 4 by 5 PM and settling down to 1 by 7 PM, signifying a return to safer levels for evening activities. This hourly cycle highlights the importance of being sun-smart during midday hours when UV rays are most potent.
| 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 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
The UV Index undergoes significant seasonal fluctuations, peaking during the summer months of June and July when it reaches an extreme level of 11 and requires only 10 minutes of exposure to cause sunburn. April through August are particularly high-risk months, with UV ratings categorized as very high to extreme. Visitors and residents should exercise caution: during high-index months, it is advisable to wear protective clothing, apply sunscreen regularly, and seek shade whenever possible. As the year transitions into the cooler months, UV exposure decreases, with January and February rated as moderate, offering different burn times of 30 minutes. November and December see a drop to low and moderate UV levels, making outdoor activities safer in terms of sun exposure, but precautions should still be taken, especially as the sun can still harm skin at lower indices.
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 |
| Powell | 3 | 5 | 6 | 8 | 10 | 11 | 11 | 10 | 8 | 6 | 3 | 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 |