Last updated: August 22, 2025
In December, the average temperature in Kortenberg, Belgium hovers around 6°C (42°F), creating a brisk atmosphere. Expect minimum lows of -5°C (23°F) and highs reaching up to 15°C (60°F). Rain is frequent, with 88 mm (3.5 in) of precipitation spread over 16 days, contributing to the notably high average humidity of 92%.
In December in Kortenberg, the average temperature is 6°C (42°F). Maximums can reach 15°C (60°F), and minimums can be as low as -5°C (23°F). It's advisable to pack warm clothing and be prepared for a mix of cool and mild days when traveling during this time.
In Kortenberg in December, the precipitation amount is 88 mm (3.5 in) spread over 16 days.
In Kortenberg in December humidity is 92%. With an average temperature of 6°C (42°F), this humidity feels like a damp chill that clings to your skin, making outdoor adventures feel more challenging and less inviting as the frigid air, combined with the heavy moisture, weighs down your spirits and leaves you yearning for warmth.
In Kortenberg 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 Kortenberg.
UV Risk Categories
Weather in Kortenberg varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Kortenberg, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 62 mm (2.4 inches) | 91% | low |
| February Weather | 6°C (42°F) | 67 mm (2.6 inches) | 89% | low |
| March Weather | 7°C (46°F) | 68 mm (2.7 inches) | 87% | moderate |
| April Weather | 10°C (51°F) | 35 mm (1.4 inches) | 85% | moderate |
| May Weather | 14°C (57°F) | 57 mm (2.3 inches) | 82% | high |
| June Weather | 18°C (65°F) | 64 mm (2.5 inches) | 82% | very high |
| July Weather | 19°C (67°F) | 71 mm (2.8 inches) | 80% | very high |
| August Weather | 19°C (67°F) | 74 mm (2.9 inches) | 76% | high |
| September Weather | 16°C (60°F) | 50 mm (2.0 inches) | 82% | moderate |
| October Weather | 13°C (55°F) | 77 mm (3.0 inches) | 89% | moderate |
| November Weather | 7°C (46°F) | 53 mm (2.1 inches) | 92% | low |
| December Weather | 6°C (42°F) | 88 mm (3.5 inches) | 92% | low |