Last updated: August 23, 2025
In December, the average temperature in Saint-Jean, France hovers around -5°C (24°F), with minimum temperatures plunging to -20°C (-3°F) and peaking at a mild 6°C (43°F). This month also brings about 184 mm (7.3 in) of precipitation spread over 16 days, contributing to an average humidity level of 90%. Stay prepared for a chilly and damp experience!
In December in Saint-Jean, the average temperature is -5°C (24°F), with a maximum that can reach 6°C (43°F) and a minimum that can drop as low as -20°C (-3°F). Be sure to pack warm clothing if you're planning to visit during this chilly month!
In Saint-Jean in December, the total precipitation amount is 184 mm (7.3 in) over the course of 16 days.
In Saint-Jean in December, humidity is 90%. With an average temperature of -5°C (24°F), this humidity feels like an icy mist wrapping around you, making every breath feel heavy and damp, while the cold sharpens the chill in the air, turning your travel experience into a battle against the harsh elements.
In Saint-Jean 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-Jean, you can visit Hourly UV Index in Saint-Jean.
UV Risk Categories
Weather in Saint-Jean varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint-Jean, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 81 mm (3.2 inches) | 91% | moderate |
| February Weather | -3°C (27°F) | 73 mm (2.9 inches) | 87% | moderate |
| March Weather | -1°C (30°F) | 115 mm (4.5 inches) | 84% | very high |
| April Weather | 2°C (36°F) | 83 mm (3.3 inches) | 83% | very high |
| May Weather | 7°C (44°F) | 143 mm (5.6 inches) | 78% | very high |
| June Weather | 12°C (54°F) | 99 mm (3.9 inches) | 75% | extreme |
| July Weather | 14°C (58°F) | 69 mm (2.7 inches) | 72% | very high |
| August Weather | 14°C (58°F) | 72 mm (2.8 inches) | 63% | very high |
| September Weather | 10°C (51°F) | 64 mm (2.5 inches) | 73% | very high |
| October Weather | 6°C (43°F) | 106 mm (4.2 inches) | 89% | high |
| November Weather | -1°C (31°F) | 106 mm (4.2 inches) | 90% | moderate |
| December Weather | -5°C (24°F) | 184 mm (7.3 inches) | 90% | low |