A ‘summer day’, which is defined as any day in which temperatures top 25C (77F) at least somewhere in Denmark.
According to the Danish Meteorology Institute (DMI), July is likely to end without reaching 77F anywhere in the country.
If that prediction holds up, it will mark the first time that Danes will have suffered through a summer-less July in nearly four decades.
“There are only three years in our records in which July contains a big fat zero when it comes to summer days and temps above 25C. That’s 1962, 1974 and 1979,” climatologist John Cappelen said on the DMI website.
DMI’s database goes back to 1874.
Thanks to David Mulberry and Jim S for these links