Today, Wednesday, Denmark experienced the first official summer day of the year, with temperatures reaching over 25 degrees. It was in the western Jutland town of Stauning that the thermometer showed 25.2 degrees, marking the beginning of summer according to the Danish Meteorological Institute (DMI). DMI shared the news on the social media platform X and speculated whether the temperature would rise further during the afternoon. An official summer day in Denmark is defined as the temperature reaching at least 25 degrees somewhere in the country.
Weather observations from Wednesday show that the highest temperatures were primarily in West Jutland, in line with DMI’s morning expectations, where there were reports of an easterly wind. The temperature was close to meeting the criteria for a summer day already on Tuesday in Stauning, where it was measured at 24.9 degrees. The earliest summer day in Denmark was recorded on April 17, 1964, while the latest first summer day was on July 30, 2004. Spring weather in Denmark can be very changeable, and therefore the timing of the first summer day also varies.
Historically, the first summer day falls on average on May 23, based on weather data from 1991 to 2020 from TV 2. Last year, the first summer day occurred on May 22, while in 2022 it was on May 18. Forecasts for this year indicated that the summer day would arrive a few days before the average date, which is now confirmed by today’s temperatures.