Last updated: July 2, 2025
Understanding the UV Index in Spirit Lake, United States, is crucial for maintaining your skin health and preventing sunburn, especially during the sunniest hours of the day. With a Csb climate, Spirit Lake experiences significant seasonal variations, but when summer rolls around, UV exposure can reach levels that pose real risks to your skin. For instance, midday UV levels can soar to 9, indicating a high risk of harm from unprotected sun exposure. Being aware of these UV levels empowers residents and visitors alike to take necessary precautions, ensuring enjoyable and safe time outdoors. Stay informed and protect your skin with our UV Index insights tailored for Spirit Lake!
The UV Index throughout the day presents a clear pattern of intensity, peaking at midday. Starting from a mild level of 1 at 07:00, the index rises steadily, reaching 2 by 08:00. The real surge occurs between 09:00 and 13:00, where it escalates from 4 to a striking 9—the highest point of the day. As the afternoon unfolds, the intensity slightly declines to 7 at 15:00, before tapering off to 5 at 16:00. The evening sees a further decrease, settling back to 2 by 18:00 and returning to 1 at 19:00. For those enjoying outdoor activities, it’s essential to take precautions, especially during the peak hours from 11:00 to 14:00 when the 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 | 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, UV exposure levels fluctuate significantly, highlighting the importance of sun safety. Winter months (January and December) present low UV Index levels of 2, allowing for relatively safe outdoor activities with a longer burn time of 45 minutes. As spring approaches, February and March see an increase to a moderate UV Index of 4 and 5, with a burn time of 30 minutes. April marks the transition to higher risk, with an index of 6 (high exposure) and burn time reducing to 25 minutes. The summer months (May to August) are particularly critical, characterized by very high UV Index levels of 8 to 9, where exposure should be limited to just 15 minutes to prevent burns. September sees a slight decrease to a high index of 7, allowing for a burn time of 25 minutes, before returning to moderate levels in October and November. Therefore, visitors and residents are strongly advised to use sun protection—such as sunscreen, hats, and protective clothing—especially during the high-risk months of May through August when UV exposure is at its peak.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Spirit Lake | 2 | 4 | 5 | 6 | 8 | 9 | 9 | 9 | 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 |