Last updated: June 18, 2025
In December, the average temperature in Saint-Denis-sur-Richelieu, Canada hovers around -5°C (23°F), with an impressive range that can dip to a chilling -27°C (-17°F) or rise to a mild 14°C (58°F). Expect approximately 90 mm (3.6 in) of precipitation spread over about 12 days, coupled with a high average humidity of 89%. Be prepared for a wintery atmosphere that blends cold with occasional warmth!
In December in Saint-Denis-sur-Richelieu, the average temperature is -5°C (23°F). Maximum can reach 14°C (58°F) and minimum can be as low as -27°C (-17°F). It's essential to prepare for a wide range of temperatures if you're planning to travel during this time.
In Saint-Denis-sur-Richelieu in December, the precipitation amount is 90 mm (3.6 in) spread over 12 days.
In Saint-Denis-sur-Richelieu in December, humidity is 89%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and prompting frequent breaks to warm up indoors.
In Saint-Denis-sur-Richelieu 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-Denis-sur-Richelieu, you can visit Hourly UV Index in Saint-Denis-sur-Richelieu.
UV Risk Categories
Weather in Saint-Denis-sur-Richelieu varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint-Denis-sur-Richelieu, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -9°C (16°F) | 84 mm (3.3 inches) | 93% | low |
| February Weather | -7°C (19°F) | 82 mm (3.2 inches) | 92% | moderate |
| March Weather | -2°C (28°F) | 85 mm (3.3 inches) | 86% | moderate |
| April Weather | 6°C (43°F) | 121 mm (4.8 inches) | 85% | very high |
| May Weather | 14°C (57°F) | 97 mm (3.8 inches) | 80% | very high |
| June Weather | 19°C (66°F) | 101 mm (4.0 inches) | 74% | very high |
| July Weather | 22°C (72°F) | 96 mm (3.8 inches) | 76% | very high |
| August Weather | 21°C (70°F) | 111 mm (4.4 inches) | 75% | very high |
| September Weather | 16°C (61°F) | 67 mm (2.6 inches) | 78% | high |
| October Weather | 10°C (50°F) | 132 mm (5.2 inches) | 86% | moderate |
| November Weather | 1°C (34°F) | 117 mm (4.6 inches) | 88% | moderate |
| December Weather | -5°C (23°F) | 90 mm (3.6 inches) | 89% | low |