Weather Report: Namur Province, Belgium – September 2025
September 2025 brought cooler and drier conditions to Namur province compared to historical averages. The month presented a mix of early autumn warmth and late-month cold snaps, with precipitation falling short of typical levels.
Temperature Overview
The average temperature for September reached 14.4 degrees Celsius, sitting 1.3 degrees below the normal value of 15.7 degrees. This represents a notable cooling anomaly for the month. The warmest day occurred on September 7 in Sombreffe, where temperatures climbed to 29.3 degrees Celsius, providing a brief taste of summer warmth. In stark contrast, the coldest reading came on September 28 in Doische, where the thermometer dropped to just 4.0 degrees Celsius, signaling the rapid transition into autumn conditions.
Precipitation Patterns
Rainfall across Namur province totaled 71.4 millimeters on average, representing a 12 percent deficit compared to the normal monthly precipitation of 80.8 millimeters. The wettest day of the month occurred on September 24 in Vresse-sur-Semois, which received 31.7 millimeters of rain. This location also recorded the highest total precipitation for the month, accumulating 157.4 millimeters, indicating that rainfall was concentrated in specific areas rather than distributed evenly across the province.
Sunshine Duration
Sunshine hours totaled 248.5 hours during September, falling 6 percent short of the normal 264.3 hours. This modest deficit reflects typical autumn cloud cover patterns as the season progressed.
Notable Observations
September 2025 demonstrated the characteristic variability of early autumn in Namur, with a 25-degree temperature range between the warmest and coldest days. The drier-than-average conditions, combined with below-normal temperatures, created conditions typical of a transitional autumn month in the Belgian Ardennes region.