September 2025 brought cooler and slightly drier conditions to Gelderland compared to historical averages. The month was characterized by moderate temperatures, substantial rainfall, and below-average sunshine, creating a typical autumn weather pattern across the province.
Temperature Overview
The average temperature for September in Gelderland reached 15.0 degrees Celsius, which is 1.4 degrees below the normal value of 16.4 degrees. This cooler-than-average month saw significant temperature variation across the region. The warmest day occurred on September 7th in Lochem, where temperatures climbed to 26.3 degrees Celsius, providing a brief taste of late summer warmth. In contrast, the coldest conditions arrived on September 23rd, also recorded in Lochem, when temperatures dropped to just 5.8 degrees Celsius, marking the transition into autumn's chill.
Precipitation Patterns
Rainfall across Gelderland averaged 72.4 millimeters for the month, remaining nearly consistent with the normal value of 73.3 millimeters, representing a one percent decrease. The wettest single day occurred on September 9th in Berg en Dal, where 31.2 millimeters of rain fell. When examining total precipitation by location, Ede emerged as the wettest area in the province, accumulating 86.0 millimeters throughout the month. This distribution of rainfall contributed to maintaining adequate moisture levels across the region.
Sunshine Duration
September experienced reduced sunshine compared to the seasonal norm. The province recorded 270.2 hours of sunshine against a normal expectation of 281.9 hours, representing a four percent deficit. This below-average sunshine was consistent with the cooler temperatures and frequent cloud cover typical of early autumn weather systems.
Notable Weather Events
The most significant precipitation event of the month was the heavy rainfall on September 9th, when Berg en Dal received over 31 millimeters in a single day. The temperature range throughout September was substantial, with a difference of 20.5 degrees Celsius between the warmest and coldest days, illustrating the dynamic nature of autumn weather patterns in Gelderland.