September 2025 Weather Report for the Netherlands
September 2025 brought cooler and slightly drier conditions to the Netherlands compared to historical averages. The month presented a mixed weather pattern with early warmth followed by a cooling trend toward the end of the period.
Temperature Overview
The average temperature for September reached 15.3 degrees Celsius, falling 1.2 degrees below the normal value of 16.5 degrees. This represents a notable cooling anomaly for the month. The warmest day occurred on September 7th in Terneuzen, where temperatures climbed to 30.3 degrees Celsius, providing a brief summer-like interlude. In stark contrast, the coldest conditions were recorded on September 28th in Zundert, where the mercury dropped to just 5.3 degrees Celsius, signaling the arrival of autumn chill.
Precipitation Patterns
Rainfall across the Netherlands totaled 70.8 millimeters for the month, approximately 8 percent below the normal average of 76.9 millimeters. Despite the overall drier trend, precipitation was not evenly distributed. The wettest single day occurred on September 9th in Echt-Susteren, where 54.3 millimeters of rain fell. When considering cumulative monthly totals by location, Alkmaar recorded the highest precipitation with 156.9 millimeters, indicating significant regional variation in rainfall distribution throughout September.
Sunshine Duration
Sunshine hours totaled 272.3 hours during September, representing a 3 percent decrease from the normal value of 280.4 hours. This modest reduction suggests relatively typical cloud cover for the season, with no extreme deviations in solar radiation.
Summary Assessment
September 2025 was characterized by below-average temperatures and slightly reduced precipitation, creating conditions slightly cooler and drier than the historical norm. The month featured a notable temperature range, from early warmth to late-month cold, while rainfall remained concentrated in specific events and locations rather than distributed evenly throughout the period.