Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Grimsby, Canada, where sunny days can quickly escalate into potential health hazards. With UV levels reaching as high as 9 during midday, awareness of these fluctuations is essential for preventing sunburn and maintaining skin health throughout the year. Grimsby's Dfb climate brings a mix of sunny weather and varying UV exposure risks, making it important for locals to stay informed and protect themselves from harmful rays while enjoying the outdoors. Regularly checking the UV Index empowers you to make informed decisions about sun safety, ensuring a healthier lifestyle in our beautiful town.
As the sun rises, the UV Index begins its journey, starting low at 1 at 07:00 AM and gradually climbing. By 09:00 AM, it hits 3, but the real intensity kicks in by 12:00 PM, peaking at an impressive 8. The UV levels reach their zenith at 1:00 PM and 2:00 PM, where they maintain a high of 9, urging sun-seekers to take precautions. As the afternoon fades, the index gradually declines, dropping to 5 by 4:00 PM and further to 4 at 5:00 PM. As evening approaches, the index settles back down to a gentle 1 by 7:00 PM. It’s a vivid reminder of the sun’s strength—safety and sun protection are key during those 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 | 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 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index experiences noticeable fluctuations, impacting the risk of skin damage due to sun exposure. High-risk months are primarily from April to August, where the UV Index reaches very high levels of 8 to 10, necessitating caution with a significantly reduced burn time of just 15 minutes. In contrast, the UV levels are much lower from January to March and again from November to December, characterized by low to moderate exposure with burn times extending up to 45 minutes. Residents and visitors should be particularly mindful during the peak summer months, ensuring adequate sun protection such as sunscreen, hats, and clothing, and seeking shade during the day to minimize the risk of skin damage. Remember, smarter sun habits can help you enjoy the outdoors safely!
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 |
| 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 |
| Grimsby | 2 | 4 | 5 | 8 | 9 | 10 | 9 | 9 | 7 | 5 | 3 | 2 |