Last updated: August 22, 2025
In December, the average temperature in Groot-Gelmen, Belgium hovers around 5°C (42°F), with a minimum dipping to -5°C (23°F) and a maximum reaching 15°C (59°F). Expect precipitation of about 103 mm (4.1 in) over approximately 18 days, contributing to a notably high average humidity of 92%.
In December in Groot-Gelmen, the average temperature is 5°C (42°F). The maximum can reach 15°C (59°F) and the minimum can be as low as -5°C (23°F). It's advisable to pack layers to stay comfortable while exploring the varied weather conditions.
In Groot-Gelmen in December, the precipitation amount is 103 mm (4.1 in) distributed over 18 days.
In Groot-Gelmen in December, humidity is 92%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.
In Groot-Gelmen 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 Groot-Gelmen.
UV Risk Categories
Weather in Groot-Gelmen varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Groot-Gelmen, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 67 mm (2.7 inches) | 91% | low |
| February Weather | 5°C (41°F) | 74 mm (2.9 inches) | 90% | low |
| March Weather | 7°C (45°F) | 76 mm (3.0 inches) | 87% | moderate |
| April Weather | 10°C (50°F) | 38 mm (1.5 inches) | 84% | moderate |
| May Weather | 14°C (57°F) | 64 mm (2.5 inches) | 77% | high |
| June Weather | 18°C (65°F) | 84 mm (3.3 inches) | 74% | very high |
| July Weather | 19°C (66°F) | 81 mm (3.2 inches) | 72% | very high |
| August Weather | 19°C (66°F) | 89 mm (3.5 inches) | 71% | high |
| September Weather | 15°C (60°F) | 64 mm (2.5 inches) | 81% | moderate |
| October Weather | 12°C (54°F) | 87 mm (3.4 inches) | 88% | moderate |
| November Weather | 7°C (45°F) | 57 mm (2.2 inches) | 91% | low |
| December Weather | 5°C (42°F) | 103 mm (4.1 inches) | 92% | low |