Weather Report: Brussels Hoofdstedelijk Gewest, January 2025
January 2025 brought a notably wet and relatively mild month to Brussels, with temperatures hovering close to seasonal norms but precipitation well above average. The capital region experienced significant rainfall throughout the month, marking a departure from typical winter conditions.
Temperature Overview
The average temperature for January in Brussels reached 2.7 degrees Celsius, just 0.2 degrees below the normal value of 2.9 degrees. Despite this slight cooling anomaly, the month featured considerable temperature variation. The warmest day occurred on January 6th in Anderlecht, where temperatures climbed to 11.6 degrees Celsius, providing a brief respite from winter conditions. In contrast, the coldest reading was recorded in Oudergem on January 14th, dropping to minus 7.9 degrees Celsius, demonstrating the typical winter extremes experienced across the region.
Precipitation Patterns
Rainfall dominated the month, with Brussels recording an average total of 153.6 millimeters, representing a substantial 42 percent above the normal precipitation of 108.5 millimeters. Sint-Jans-Molenbeek experienced the heaviest single-day rainfall on January 5th, receiving 26.4 millimeters. The wettest location across the month was Ukkel, accumulating 165 millimeters of precipitation, underscoring the region's exposure to Atlantic weather systems during this period.
Sunshine and Notable Conditions
Sunshine hours were notably deficient, with only 79.2 hours recorded against a normal expectation of 103 hours, representing a 23 percent shortfall. This reduction in sunshine reflects the frequent cloud cover and wet conditions that characterized January across Brussels. The combination of above-average rainfall and below-average sunshine created typical winter weather patterns, with frequent overcast skies and wet surfaces dominating the month.