The Netherlands records hottest summer ever in 2026, says KNMI

**The Netherlands Experiences Its Hottest Summer on Record, KNMI Reports**

The Royal Dutch Meteorological Institute (KNMI) has confirmed that the summer of 2026 was the warmest in the Netherlands since systematic temperature recordings began in 1901. Data from the De Bilt weather station show an average temperature of 19.3 °C (66.7 °F) for the three‑month period, surpassing the previous record of 18.9 °C set in 2018, according to the Dutch public broadcaster NOS.

KNMI climate expert Peter Siegmund told NOS that the summer featured an unprecedented number of days with temperatures above 35 °C (95 °F) and a record count of “tropical days” – days when the minimum temperature remains at or above 20 °C (68 °F). He also noted that consecutive nights with temperatures of 22 °C (71.6 °F) or higher had never been observed before. “And it all started in June, normally the least warm summer month. That really surprised me,” Siegmund said.

June 2026 saw temperatures climb to new highs, prompting KNMI to issue a red code for extreme heat—the first such alert in the country’s history. The heatwave was followed by additional periods of elevated temperatures and an ongoing drought, according to the institute’s observations.

Siegmund warned that recent summer temperatures already exceed the projections of KNMI’s most severe climate scenario, which assumes rapidly increasing greenhouse‑gas emissions. The institute estimates that extreme summers like that of 2026 could become a regular occurrence, potentially every five years, as climate trends continue. Based on current warming rates, the average summer conditions experienced in 2026 are projected to resemble the typical summer climate expected for 2050 under the highest emission scenario.

“The high scenario predicts a continued rise in temperature at roughly the same rate observed over the past three decades, extending to the end of the century,” Siegmund explained. “In the low scenario, temperatures would keep rising until about 2050 and then stabilize. By 2050 the difference between the two scenarios is roughly one degree Celsius; by 2100 the gap widens to about four degrees.” He emphasized that climate policy could still influence the trajectory of future warming.

The outlook for the coming autumn remains uncertain. Historical data indicate that Dutch autumns have become warmer and wetter over the past century, and the relatively warm North Sea may bring heavier rainfall to the region in the upcoming months.

The KNMI’s findings underscore the increasing frequency of extreme heat events in the Netherlands and highlight the broader implications of ongoing climate change for the country’s weather patterns.

Article and image source: iamexpat.nl