Reader is almost 60 and cannot remember such temps.
“I am almost 60 but cannot remember such temps have ever been mentioned for Germany, where -10 °C are considered “extreme cold” according to warnings by weather services.
In fact, -10°C isn’t (wasn’t???) occurring often, maybe every 3rd winter once
“In the night from Jan 6 to Jan 7, certain spots in South-West and East Germany reached almost -30°C (-22F) (no, NOT in the Alps!).”