Last updated: June 18, 2025
In December, the average temperature in Saint-Leonard, Canada hovers around -8°C (18°F). You can expect a chilly range, with minimums dipping to -26°C (-14°F) and maximums reaching up to 14°C (58°F). Additionally, prepare for some moisture, as 110 mm (4.3 in) of precipitation can fall over approximately 11 days, all while battling an average humidity of 90%.
In December in Saint-Leonard, the average temperature is -8°C (18°F), with maximums reaching 14°C (58°F) and minimums dipping as low as -26°C (-14°F). It's essential to pack warm clothing if you're planning to visit during this month.
In Saint-Leonard in December, the precipitation amount is 110 mm (4.3 in) spread over 11 days.
In Saint-Leonard in December, humidity is 90%. With an average temperature of -8°C (18°F), this humidity feels like an icy fog wrapping around you, making every breath sharp and crisp, and requiring careful planning for travel to avoid the chill while navigating the damp air.
In Saint-Leonard 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 Saint-Leonard, you can visit Hourly UV Index in Saint-Leonard.
UV Risk Categories
Weather in Saint-Leonard varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint-Leonard, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -11°C (13°F) | 92 mm (3.6 inches) | 93% | low |
| February Weather | -9°C (15°F) | 75 mm (2.9 inches) | 92% | moderate |
| March Weather | -5°C (24°F) | 76 mm (3.0 inches) | 90% | moderate |
| April Weather | 3°C (37°F) | 121 mm (4.8 inches) | 87% | high |
| May Weather | 10°C (51°F) | 100 mm (3.9 inches) | 82% | very high |
| June Weather | 15°C (60°F) | 90 mm (3.5 inches) | 77% | very high |
| July Weather | 19°C (66°F) | 89 mm (3.5 inches) | 81% | very high |
| August Weather | 18°C (64°F) | 84 mm (3.3 inches) | 83% | very high |
| September Weather | 13°C (56°F) | 106 mm (4.2 inches) | 85% | high |
| October Weather | 7°C (44°F) | 126 mm (4.9 inches) | 87% | moderate |
| November Weather | -1°C (31°F) | 125 mm (4.9 inches) | 87% | moderate |
| December Weather | -8°C (18°F) | 110 mm (4.3 inches) | 90% | low |