Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Brantford, Canada, where the Dfb climate can lead to significant sun exposure throughout the year. By staying informed about UV levels, you can effectively prevent sunburn and protect your skin's health. The daily UV Index in Brantford peaks in the early afternoon, with levels soaring to 9 between 1 PM and 2 PM—a reminder that even on seemingly mild days, the risk of skin damage increases rapidly. Armed with this knowledge, you can enjoy the outdoors while taking necessary precautions against harmful UV radiation.
As the sun rises, the UV Index begins its ascent, starting at a mild 1 at 07:00. By 08:00, it climbs to a 2, indicating a low risk of harm from unprotected sun exposure. However, from 09:00 onwards, the intensity builds, peaking at 9 between 13:00 and 14:00—a time when precautions are essential to protect skin from damage. The afternoon hours see a slight decrease, dropping to 8 at 15:00 and further declining to 4 by 17:00. As the sun sets, the UV Index falls back down to 1 by 19:00, marking a return to safer levels. Stay vigilant during those midday hours to enjoy the sunshine while keeping your skin healthy!
| 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 | 8 | very high | 15 min |
| 16:00 | 6 | high | 25 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 shows significant seasonal variations that influence sun exposure risks for both visitors and residents. From January to March, the index starts low at 2 but rises to 5 by March, indicating moderate exposure risks with burn times decreasing from 45 minutes to 30 minutes. The spring and summer months, particularly April to August, present the highest risks, with UV Index values soaring to 9 and 10 during the peak months of May and June. Here, the burn time drops dramatically to just 15 minutes, categorizing these months as very high risk. September sees a slight decrease to 7 (high exposure) while October and November return to moderate levels with indices of 5 and 4. As winter arrives in December, the UV Index falls to 2, marking a return to low exposure risks. It's crucial for everyone to be aware of these fluctuations: during high-risk months, especially from April to August, it is advisable to limit sun exposure, wear protective clothing, and apply sunscreen regularly to prevent 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 |
| 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 |
| Brantford | 2 | 4 | 5 | 8 | 9 | 10 | 9 | 9 | 7 | 5 | 4 | 2 |