I somehow came across a fact that the coldest day of 2022 in Stockholm was December, 17th:
Årets kallaste dag 2022 inträffade den 17 december då minimitemperaturen var -11,8°C.
And it happened so, that exactly on that day I went to Järvafältets naturreservat after returning from Dublin a few days earlier, and even made a little photo report about that:
https://yannis.livejournal.com/646983.html And it turns out it was the coldest day of the year!
Meanwhile, it's -10 C right now, and in a few days the temperatures as low as -15 C are expected.
Well, we shall see.
Meanwhile: