To be able to call a day tropical, it must be warmer than 30 degrees at one of the official measuring points in the Netherlands. There is an official tropical day when it also becomes 30 degrees or more at the main station in De Bilt, where it is currently 24.7 degrees.
In the current climate period, June 7 is on average the first local tropical day. This means that the 2022 figure falls almost three weeks earlier than usual. Thirty years ago, the average temperature on June 19 was even warmer than 30 degrees. Last year, on June 16, the mercury rose to 31.6 degrees in Ell, Limburg. The earliest first local tropical day of the year ever measured was April 21, 1968. In the Netherlands, a year has an average of one tropical day in the Wadden area to ten tropical days in Limburg.
Another weather record was also broken on Wednesday: with locally more than 28 degrees after noon, it was never this warm on May 18.