Last updated: August 1, 2025
Understanding the UV Index is crucial for residents of Warren, Canada, to protect their skin and overall health from harmful rays. With the potential for sunburn and long-term skin damage, being aware of UV levels helps you make informed decisions about sun exposure throughout the day. Warren's Dfb climate brings varied weather conditions, but during peak summer hours—especially between 11:00 AM and 3:00 PM—the UV Index can reach significant levels, peaking at 8. By monitoring the UV Index, you can enjoy the outdoors while taking the necessary precautions to safeguard your skin.
As the sun rises, the UV Index begins at a modest 1 at 07:00, gradually climbing as the morning progresses. By 09:00, it increases to 3, signaling a gentle reminder to enjoy the outdoors with care. The intensity peaks at 12:00, reaching a striking 7, followed closely by a high of 8 between 13:00 and 14:00. This period marks the height of the solar exposure; it's advisable to wear sunscreen and seek shade if necessary. As the afternoon wanes, the index begins its descent, dropping to 4 by 17:00 and further declining to 1 by 19:00, making for a more comfortable end to the day. Keep this data in mind for planning your outdoor activities!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 7 | high | 25 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 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index exhibits significant seasonal variations, with the highest levels observed during the summer months. High-risk months include June, July, and August, when the UV Index reaches as high as 9, indicating very high exposure risk and a burn time of just 15 minutes. In contrast, the lowest UV levels occur in January and December, categorized as low with a burn time of 45 minutes. Visitors and residents should take extra precautions, particularly from April to August, by wearing protective clothing, using sunscreen, and limiting sun exposure during peak hours to reduce the risk of skin damage.
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 |
| Warren | 2 | 4 | 4 | 7 | 7 | 9 | 8 | 8 | 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 |