Last updated: August 1, 2025
Understanding the UV Index in Shannon, Canada is essential for protecting your skin and maintaining overall health, especially during the summer months when the sun's rays are stronger. The UV Index provides valuable information about the intensity of ultraviolet radiation, helping residents take proactive measures against sunburn and long-term skin damage. In Shannon's Dfb climate, characterized by warm summers, it's crucial to be aware of varying UV levels—peaking at an index of 8 during midday, which indicates a higher risk for harmful effects. By staying informed about the UV Index, you can enjoy the outdoors while prioritizing your skin's safety and well-being.
The UV Index throughout the day showcases a dynamic range of exposure, beginning at a low 1 at 7:00 AM and gradually climbing to a peak of 8 between 12:00 PM and 1:00 PM. This signifies a critical window for sun protection, particularly around 11:00 AM and 12:00 PM when the index reaches 7 and 8, respectively. As the afternoon unfolds, the index gradually declines, dipping back to 6 by 3:00 PM and then further to 4 at 4:00 PM. By the evening, the UV intensity has diminished to a gentle 1 at 7:00 PM. It's essential to stay aware of these fluctuations, ensuring that sun safety measures are taken during peak hours!
| 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 | 7 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences significant seasonal fluctuations, with high-risk months occurring during the spring and summer. Starting in April, the index rises dramatically, peaking in May and June at a level of 9, classifying these months as having a very high risk of UV exposure, with a burn time of only 15 minutes. July and August maintain similar levels, while September sees a slight decrease to 7, indicating a high risk with a burn time extending to 25 minutes. As the year progresses into the fall and winter months, the UV Index diminishes, dropping back to low levels in January and December. For visitors and residents, it is crucial to take precautions during high UV months, such as wearing sunscreen, protective clothing, and limiting sun exposure, especially around midday when UV rays are strongest.
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 |
| Shannon | 2 | 3 | 5 | 8 | 9 | 9 | 8 | 8 | 7 | 5 | 3 | 2 |
| 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 |