Last updated: June 18, 2025
In December, the average temperature in St-Jean-Port-Joli, Canada hovers around -6°C (21°F), with extremes ranging from a biting -23°C (-9°F) to a milder 12°C (54°F). During this time, expect 104 mm (4.1 in) of precipitation spread across 11 days, contributing to an average humidity level of 92%. Prepare for a chilly and damp month!
In December in St-Jean-Port-Joli, the average temperature is -6°C (21°F), with maximums reaching 12°C (54°F) and minimums dipping as low as -23°C (-9°F). It's essential to pack warm clothing and be prepared for significant temperature fluctuations if you're planning to travel during this time.
In St-Jean-Port-Joli in December, the precipitation amount is 104 mm (4.1 in) over the course of 11 days.
In St-Jean-Port-Joli in December humidity is 92%. With an average temperature of -6°C (21°F), this humidity feels like an icy blanket that clings to your skin, making the cold air feel even more biting and heavy, which can be quite challenging for traveling.
In St-Jean-Port-Joli in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in St-Jean-Port-Joli.
UV Risk Categories
Weather in St-Jean-Port-Joli varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in St-Jean-Port-Joli, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -10°C (15°F) | 90 mm (3.6 inches) | 95% | low |
| February Weather | -9°C (17°F) | 82 mm (3.2 inches) | 93% | moderate |
| March Weather | -4°C (25°F) | 98 mm (3.9 inches) | 90% | moderate |
| April Weather | 2°C (35°F) | 138 mm (5.4 inches) | 87% | high |
| May Weather | 9°C (48°F) | 111 mm (4.4 inches) | 79% | very high |
| June Weather | 15°C (60°F) | 96 mm (3.8 inches) | 73% | very high |
| July Weather | 19°C (66°F) | 78 mm (3.1 inches) | 81% | very high |
| August Weather | 19°C (66°F) | 82 mm (3.2 inches) | 81% | very high |
| September Weather | 14°C (58°F) | 85 mm (3.3 inches) | 81% | high |
| October Weather | 8°C (47°F) | 158 mm (6.2 inches) | 87% | moderate |
| November Weather | 0°C (32°F) | 130 mm (5.1 inches) | 89% | moderate |
| December Weather | -6°C (21°F) | 104 mm (4.1 inches) | 92% | low |