would still have been considered cold back then as it would have been 1c below the 1961-1990 average only 1981 had a colder Dec in the 1980s then you have to go to 1992 to find the next colder Dec ..probably that exceptional cold snow event at the end is what makes it memorable. For Example Jan 1980 was colder than every Jan from 1988 -2010 but no one remembers it.