Bornholm has been the second warmest day of this season in 147 years.
Although the calendar shows only April 6, the weather is almost summer in parts of the country.
Hot air for the season is flowing over Denmark from the south and southeast, and this has caused the temperature to rise to the highest level this year.
The warmest was in Store Jyndevad, near the Danish-German border, where the DMI weather station measured 21.0 degrees. In several other places in the southern and central part of Jutland the temperature has also reached over 19 degrees.