Last updated: August 22, 2025
In December, the average temperature in Saint-Germain, Belgium hovers around 5°C (41°F), with a minimum of -4°C (24°F) and a maximum reaching 15°C (58°F). Expect 105 mm (4.1 in) of precipitation over 18 days, contributing to an average humidity of 92%. Stay prepared for a chilly and damp month!
In December in Saint-Germain, the average temperature is 5°C (41°F). The maximum can reach 15°C (58°F) and the minimum can be as low as -4°C (24°F). It's advisable to pack layers for your trip, as temperatures can vary significantly throughout the day.
In Saint-Germain in December, the total precipitation amount is 105 mm (4.1 in) over a span of 18 days.
In Saint-Germain in December humidity is 92%. With an average temperature of 5°C (41°F), this humidity feels like a cold, damp blanket enveloping you, making travel uncomfortable and dampening the spirits of those unprepared for the chill.
In Saint-Germain 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 Saint-Germain.
UV Risk Categories
Weather in Saint-Germain varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint-Germain, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (38°F) | 69 mm (2.7 inches) | 91% | low |
| February Weather | 5°C (41°F) | 73 mm (2.9 inches) | 89% | moderate |
| March Weather | 7°C (45°F) | 77 mm (3.0 inches) | 87% | moderate |
| April Weather | 10°C (50°F) | 41 mm (1.6 inches) | 85% | moderate |
| May Weather | 13°C (56°F) | 67 mm (2.6 inches) | 82% | high |
| June Weather | 18°C (64°F) | 78 mm (3.1 inches) | 82% | very high |
| July Weather | 19°C (66°F) | 77 mm (3.0 inches) | 80% | very high |
| August Weather | 18°C (66°F) | 89 mm (3.5 inches) | 76% | high |
| September Weather | 15°C (59°F) | 65 mm (2.5 inches) | 82% | moderate |
| October Weather | 12°C (53°F) | 86 mm (3.4 inches) | 89% | moderate |
| November Weather | 7°C (44°F) | 60 mm (2.3 inches) | 92% | low |
| December Weather | 5°C (41°F) | 105 mm (4.1 inches) | 92% | low |