Weather Report: Friesland, September 2025
September 2025 brought cooler and wetter conditions to Friesland compared to historical averages. The month was characterized by below-normal temperatures and above-average rainfall, creating a distinctly autumnal atmosphere across the province.
Temperature Overview
The average temperature for September reached 14.9 degrees Celsius, falling 1.2 degrees below the normal value of 16.1 degrees. This cooler-than-average month saw considerable variation between extremes. The warmest day occurred on September 7 in Ooststellingwerf, where temperatures climbed to 25.6 degrees Celsius, providing a brief taste of late summer warmth. In stark contrast, the coldest conditions arrived later in the month on September 24, also in Ooststellingwerf, when temperatures dropped to just 6.0 degrees Celsius, signaling the rapid transition toward autumn.
Precipitation Patterns
Rainfall was notably above normal throughout the month. Friesland received an average of 88.4 millimeters of precipitation, representing a 10 percent increase above the normal value of 80.3 millimeters. The wettest day occurred on September 16, when Ooststellingwerf recorded 20.2 millimeters of rain. Súdwest-Fryslân emerged as the wettest location in the province, accumulating 98.4 millimeters over the month, indicating that western parts of Friesland experienced particularly wet conditions.
Sunshine and Notable Observations
Sunshine hours totaled 276.5 hours, slightly below the normal 282.1 hours, representing a 2 percent deficit. This modest reduction in sunshine combined with increased rainfall to create predominantly cloudy and damp conditions typical of early autumn in the northern Netherlands.
September 2025 in Friesland was defined by cooler temperatures, increased rainfall, and slightly reduced sunshine, all contributing to a characteristically wet and cool autumn transition period.