Last updated: May 3, 2025
In Sioux Lookout, Canada, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn. With its Dfb climate, residents often experience varying UV exposure throughout the day, peaking in the afternoon when the index can reach levels as high as 8—indicating a significant risk of harm from unprotected sun exposure. Understanding these UV levels helps you take proactive steps to protect your skin, ensuring you enjoy the beautiful Canadian summers safely. Whether you’re spending a day outdoors or doing yard work, knowing the UV Index empowers you to make informed decisions about sun safety.
The UV Index throughout the day displays a captivating rise and fall, peaking at 12:00 PM and 1:00 PM with a substantial value of 8, indicating a high risk of harm from unprotected sun exposure. As the sun climbs, the index escalates from a mild 1 at 7:00 AM to a moderate 6 by 11:00 AM. It surges further as noon approaches, reaching its zenith before gradually tapering off in the afternoon, showcasing 7 at 2:00 PM, and dwindling to 1 by 7:00 PM. This pattern highlights the importance of sun protection during mid-day hours, when the sun's intensity is at its most fierce. Enjoy the sun 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 | 5 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 6 | 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, the UV Index reflects significant seasonal changes, influencing sun safety for both visitors and residents. The highest risk months for UV exposure are May to July, when the index reaches its peak at 9 in June, indicating a very high exposure category and a burn time of just 15 minutes. As spring transitions into summer, attention should be heightened, particularly in April with an index of 7 (high) and a burn time of 25 minutes, as well as in August and September, when the index remains in the high range. Conversely, the winter months—January, November, and December—present a low UV risk, with indices between 1 and 2 and extended burn times of 45 minutes. Visitors and residents should take proactive measures during high UV months, such as using sunscreen, wearing protective clothing, and seeking shade, while enjoying more relaxed sun safety practices in the cooler months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Edmonton UVI | 2 | 3 | 5 | 6 | 7 | 7 | 8 | 7 | 6 | 4 | 2 | 1 |
| Calgary UVI | 2 | 3 | 4 | 6 | 8 | 8 | 9 | 8 | 7 | 4 | 2 | 1 |
| Sioux Lookout | 2 | 3 | 5 | 7 | 8 | 9 | 8 | 7 | 6 | 4 | 2 | 1 |
| Montreal UVI | 2 | 4 | 5 | 7 | 9 | 9 | 8 | 8 | 7 | 5 | 3 | 2 |
| Ottawa UVI | 2 | 4 | 5 | 8 | 9 | 9 | 8 | 8 | 7 | 5 | 3 | 2 |
| Toronto UVI | 2 | 4 | 5 | 8 | 9 | 9 | 9 | 9 | 7 | 5 | 3 | 2 |