using BWI ...
Decembers this century with below normal avg temp (12 out of 23)
2000, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2016, 2017, 2022
Dec 2000 shows as 7th coldest on record, (since 1873). Coldest, by far, is 1989....if you remember that.
Decembers this century with above normal total snowfall (7 out of 23)
2002, 2003, 2005, 2007, 2009, 2013, 2017
So yes, we had a string of colder Decembers, but lately pretty lame.