September 2025 in Overijssel: A Cooler and Wetter Month
September 2025 brought notably cooler and wetter conditions to the province of Overijssel compared to historical averages. The month was characterized by below-normal temperatures and above-average precipitation, marking a departure from typical early autumn weather patterns in this eastern Dutch province.
Temperature Overview
The average temperature for September in Overijssel reached 14.9 degrees Celsius, falling 1.4 degrees below the normal value of 16.3 degrees. This cooler-than-average month saw significant temperature variation across the province. The warmest day occurred on September 7 in Olst-Wijhe, where temperatures climbed to 26.0 degrees Celsius, providing a brief taste of summer warmth. In stark contrast, the coldest reading came on September 23 in Almelo, where temperatures dipped to just 5.6 degrees Celsius, signaling the arrival of autumn's chill.
Precipitation Patterns
Rainfall across Overijssel totaled 82.0 millimeters on average, representing a 6 percent increase above the normal precipitation of 77.7 millimeters. The wettest single day occurred on September 9 in Enschede, where 21.2 millimeters of rain fell. Almelo emerged as the wettest location for the entire month, accumulating 96.3 millimeters of precipitation, indicating that eastern portions of the province experienced particularly wet conditions.
Sunshine and Notable Features
Sunshine hours totaled 274.0 hours across the month, slightly below the normal value of 284.4 hours, representing a 4 percent deficit. This reduction in sunshine, combined with increased rainfall and cooler temperatures, created typical autumn weather conditions. The combination of these factors—cooler temperatures, above-average rainfall, and slightly reduced sunshine—painted a picture of an early autumn month that felt distinctly more seasonal than average, with the transition from summer to fall occurring somewhat earlier than usual in Overijssel.