June 2025 brought warmer than average conditions to the Netherlands, with temperatures running slightly above normal throughout the month. The average temperature reached 18.1 degrees Celsius, exceeding the normal value of 17.6 degrees by 0.5 degrees. This modest warming set the stage for notable temperature extremes, particularly in the latter part of the month.
The temperature range across the country was substantial. Eindhoven recorded the highest temperature of the month at 34.0 degrees Celsius on June 13, while Lochem experienced the coldest conditions with a low of 7.4 degrees on June 3. This 26.6-degree difference highlights the variability in weather patterns experienced during this period.
Precipitation levels were notably elevated during June, with an average total of 66.8 millimeters across the Netherlands. This represented an 11 percent increase above the normal precipitation of 60.0 millimeters. The wettest single day occurred in Dantumadiel on June 8, when 55.9 millimeters of rain fell. Over the entire month, Dantumadiel emerged as the wettest location in the country, accumulating 132.9 millimeters of rainfall.
Sunshine hours exceeded expectations, with 393.2 hours recorded across the month compared to a normal value of 375.7 hours, representing a 5 percent surplus. This additional sunshine contributed to the warmer conditions experienced throughout June.
A significant weather event marked the end of the month: a moderate heatwave developed from June 28 and extended into early July, lasting five days. Multiple locations across the southern and central Netherlands experienced peak temperatures during this event, including Helmond, Heerlen, Roosendaal, Sittard-Geleen, and Etten-Leur. This heatwave represented the most notable weather phenomenon of the month.