December 2025 brought a notably dry and sunny month to Belgium, with temperatures remaining close to seasonal norms. The month presented an interesting contrast between mild early days and a cold Christmas period, while precipitation fell significantly below average across the country.
Temperature Overview
Belgium experienced an average temperature of 5.7 degrees Celsius throughout December, which matched the long-term normal exactly with no temperature anomaly recorded. The warmest conditions occurred early in the month, with Maaseik recording a high of 14.7 degrees Celsius on December 9th. In stark contrast, the coldest reading came on Christmas Day when Bütgenbach dropped to minus 6.4 degrees Celsius, creating a temperature range of over 21 degrees between the month's extremes. This significant variation reflects the typical December pattern of transitional weather systems moving across the region.
Precipitation Patterns
December proved exceptionally dry, with an average total of just 31.7 millimeters across Belgium compared to the normal expectation of 69.5 millimeters. This represents a substantial 54 percent deficit in rainfall. The wettest day occurred on December 16th in Bekkevoort, which received 20.7 millimeters. When examining individual locations, Vresse-sur-Semois emerged as the wettest area with a total of 68.8 millimeters for the entire month, still below the seasonal average despite being the most precipitation-rich location.
Sunshine and Notable Conditions
One of December's most striking features was the abundance of sunshine. Belgium recorded 106.8 hours of sunshine, exceeding the normal value of 85 hours by 26 percent. This above-average sunshine, combined with the dry conditions, created relatively clear skies throughout much of the month. The combination of lower precipitation and increased sunshine hours suggests that cloud cover was less persistent than typical for this winter month, allowing more solar radiation to reach the surface despite the season's inherent limitations on daylight hours.