Last updated: June 18, 2025
In December, the average temperature in Brockville, Canada hovers around -2°C (29°F). Be prepared for temperature swings, with a minimum dropping to -26°C (-14°F) and a maximum reaching up to 15°C (59°F). Rain or snow is likely, with an average precipitation of 93 mm (3.7 in) over 12 days. With an average humidity of 89%, expect a cold and damp ambiance during your stay!
In December in Brockville, the average temperature is -2°C (29°F), with maximums reaching 15°C (59°F) and minimums plummeting to -26°C (-14°F). It's a time when travelers should prepare for chilly conditions and dress in layers to fully enjoy the winter wonderland.
In Brockville in December, the precipitation amount is 93 mm (3.7 in) over the course of 12 days.
In Brockville in December humidity is 89%. With an average temperature of -2°C (29°F), this humidity feels like a suffocating fog that clings to your skin, making outdoor adventures less enjoyable and giving travel a heavy and oppressive feel.
In Brockville in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Brockville, you can visit Hourly UV Index in Brockville.
UV Risk Categories
Weather in Brockville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Brockville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 82 mm (3.2 inches) | 93% | low |
| February Weather | -5°C (23°F) | 82 mm (3.2 inches) | 93% | moderate |
| March Weather | 0°C (31°F) | 84 mm (3.3 inches) | 86% | moderate |
| April Weather | 6°C (44°F) | 125 mm (4.9 inches) | 82% | very high |
| May Weather | 13°C (56°F) | 103 mm (4.1 inches) | 75% | very high |
| June Weather | 18°C (65°F) | 94 mm (3.7 inches) | 68% | very high |
| July Weather | 22°C (72°F) | 127 mm (5.0 inches) | 69% | very high |
| August Weather | 21°C (70°F) | 105 mm (4.2 inches) | 67% | very high |
| September Weather | 17°C (63°F) | 73 mm (2.9 inches) | 72% | high |
| October Weather | 11°C (52°F) | 151 mm (5.9 inches) | 83% | moderate |
| November Weather | 3°C (38°F) | 113 mm (4.5 inches) | 88% | moderate |
| December Weather | -2°C (29°F) | 93 mm (3.7 inches) | 89% | low |