Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Lorne, Canada, where the climate can lead to significant sun exposure during the warmer months. Recognizing the daily fluctuations in UV levels helps with effective sunburn prevention and promotes long-term skin health, particularly as the index can reach concerning levels—peaking at 8 during midday hours. With Lorne's Dfb climate, you might be surprised at the risks associated with UV radiation, even on overcast days. Stay informed and protect your skin by tracking the UV Index as you enjoy the beautiful outdoors!
As the day unfolds, the UV Index begins its ascent, starting at a low of 1 at 7:00 AM and reaching a peak of 8 between 12:00 PM and 2:00 PM. This midday surge signals the strongest sun exposure, making it essential to take precautions if you plan to spend time outdoors. After this peak, the index gradually declines, dropping to 4 by 5:00 PM and easing back to 1 by 7:00 PM, signaling a retreat of the sun's intensity. Remember, during those high hours, keeping your skin safe is key!
| 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 | 8 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the year progresses, UV Index levels exhibit significant seasonal variations, indicating a notable increase in sun exposure risk during the warmer months. From January to March, the UV Index starts relatively low, peaking at a moderate level of 5 in March, when burn time is reduced to 30 minutes. However, by April, the index escalates sharply to 8, marking the beginning of the high-risk months, which continue through June with a peak of 10 in June. July and August maintain a high UV Index of 8, requiring caution for both residents and visitors. As summer transitions to fall, the UV Index gradually decreases, dropping to 4 in October and returning to low levels of 2 in November and December. During the high-risk months of April to September, it is essential to take protective measures such as wearing sunscreen, hats, and sunglasses, and seeking shade during peak hours to avoid overexposure.
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 |
| Lorne | 2 | 3 | 5 | 8 | 8 | 10 | 8 | 8 | 7 | 4 | 2 | 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 |