Mid Atlantic area is really weird with weather. All depends on pressure systems off the coast and down south messing with the Jet stream.
I've lived here for 50 years. There were times we had blizzards multiple years in a row, then 10-12 years with nothing more than small storms. Some years no snow. Some years frigid and brutal. Some mild Winters. Summer usually hot and humid. Almost always a couple of days in July near/over 100 most years.
The worst Winters I experienced in my lifetime were the Winter of 1977 and 2014. Both years the upper bay was totally frozen over and you could walk around on it. Worst snow storms were 1978, 1983, 1996, 2010, and 2016. The 2016 was the biggest single one - got 40 inches in Frederick. 2010 was the back-to-back blizzards that would up putting 5ft in total down.