This year we had to wait longer than usual for the first warm day, because in the warming climate the first warm day falls earlier and earlier. In the previous climate period (1981-2010) the first warm day was on April 17. Last year that was on April 12, in 2021 already on March 30. On average, it happens once every ten years that the first official warm day already falls in March. In March 2014, the temperature even rose above 20 degrees in De Bilt on three days.
First official warm day of the year: 20.2 degrees in De Bilt
