Last updated: July 2, 2025
Understanding the UV Index in Crookston, United States, is crucial for protecting your skin and overall health. With peak UV levels reaching as high as 9 during the midday hours, being aware of these indexes can help you prevent sunburn and long-term skin damage. Crookston's humid continental climate (Dfb) presents unique challenges, such as increased sun exposure during the summer months. Keep yourself informed about UV levels to enjoy sun safety while embracing the great outdoors!
As the sun rises, the UV Index begins its slow ascent, starting at a gentle 1 at 07:00. By 08:00, it nudges up to 2, signaling a gradual increase in sun intensity. The real action begins around 10:00, where it reaches 4, peaking at 12:00 with a significant 8. This intense exposure continues, hitting its maximum at 13:00 and 14:00 with a whopping 9—a reminder to slather on that sunscreen! As the afternoon fades, the index descends, dipping to 6 by 16:00 and declining further to 2 by 18:00. Finally, as night approaches, the UV risks taper off to a safe 1 at 19:00. Stay sun-smart throughout the day to enjoy those rays safely!
| 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 | 8 | very high | 15 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, the UV Index experiences notable fluctuations, impacting sun safety practices for both residents and visitors. From January to March, the UV levels are relatively low to moderate, with burn times ranging from 30 to 45 minutes. However, April marks the beginning of higher UV exposure, reaching a peak in May and June, where the index hits 9, classified as very high, and the burn time drops to just 15 minutes. July and August maintain these critical levels, posing significant risk for unprotected skin. September sees a decrease to a high index of 7, while October and November present moderate conditions again, allowing burn times of 30 minutes. By December, UV exposure returns to low levels. Visitors and residents are strongly advised to prioritize sun protection during the high-risk months of May through August, by applying sunscreen, seeking shade, and wearing protective clothing to minimize the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Crookston | 2 | 4 | 5 | 7 | 8 | 9 | 9 | 8 | 7 | 4 | 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 |