Meteorologist Max Lindberg Stoltz at Swedish weather agency SMHI described the autumnal weather as “unusual”.
Since October 3rd, all of SMHI's weather stations have measured what's known as meteorological autumn, which is defined by average daytime temperatures staying below an average of 10C for five consecutive days.
And in some parts of the northern mountain ranges, winter temperatures (five consecutive days of average temperatures below 0C) have already arrived, some two weeks earlier than average.
Summer hasn't ended this early since 1979, when autumn officially began on September 3rd.
And the autumn is off to a blustery start, with damp and windy weather, known as höstrusk in Swedish, forecast for the coming days.
“It will be unstable. Cloud and rainshowers will dominate, and up in the north there will be flurries of snowfall,” said Lindberg Stoltz.
Towards the end of the week, some warmer air will move in, and parts of the country can look forward to temperatures in at least the double digits then.
“It will be mostly Götaland [which gets the warmer weather],” he added. “The west coast will be warmest, but also the east coast. Kalmar could have 12-13C temperatures.”