September 2025 in the province of Utrecht was characterized by cooler than normal temperatures and precipitation levels that matched the seasonal average. The month presented a typical autumn pattern with considerable variation between the warmest and coldest days, reflecting the transitional nature of early fall weather in the Netherlands.
Temperature Overview
The average temperature for September in Utrecht reached 15.1 degrees Celsius, which was 1.3 degrees below the normal value of 16.4 degrees. This cooler-than-average month saw significant temperature fluctuations across the province. The warmest day occurred on September 7th in Utrecht city, where temperatures climbed to 26.0 degrees Celsius, providing a brief taste of summer warmth. In contrast, the coldest conditions were recorded on September 23rd in Leusden, where temperatures dropped to just 6.2 degrees Celsius, marking a substantial 19.8-degree difference between the month's extremes.
Precipitation Patterns
Rainfall during September was precisely at the normal level, with an average total of 77.5 millimeters across the province. This matched the seasonal expectation exactly, indicating typical autumn moisture patterns. The wettest single day occurred on September 9th in Veenendaal, where 27.9 millimeters of rain fell. When examining total precipitation by location, Wijk bij Duurstede emerged as the wettest area in the province, accumulating 93.1 millimeters over the month.
Sunshine and Notable Observations
Sunshine hours totaled 267.6 hours during September, representing a 4 percent decrease from the normal value of 278.9 hours. This modest reduction in sunshine is consistent with the cooler temperatures observed throughout the month and reflects the increasing cloud cover typical of the transition into autumn. The combination of below-average temperatures, normal precipitation, and slightly reduced sunshine hours created conditions characteristic of a typical Dutch September, with weather patterns showing the gradual shift from summer toward winter conditions.