According to the Swedish Meteorological and Hydrological Institute (SMHI), autumn arrives when a place has an average daily temperature of below 10 degrees, for five consecutive days. Winter arrives at temperatures below 0 degrees for five days in a row.
And now there is autumn and winter throughout the country. Since Saturday, not even the southernmost part of Sweden has meteorological summer anymore.
Autumn extends about half the country. From northern Dalarna and the Sundsvall area and northwards, winter prevails. A few more areas in Dalarna and Västmanland have winter temperatures and will soon have winter if the weather holds.
The normal arrival of autumn has been postponed by about a week, as the reference period 1991–2020 has been changed to the reference period 1961–1990 at the earliest. Both August and September are also clearly warmer than before.