A weather forecaster at the National Weather Service (NWS) at Dulles airport told the BBC the snowstorms would be reducing in the next few hours.
The NWS has cancelled all storm warnings, but said gusty winds could lead to icy conditions, blowing snow, and reduced visibility along the mid-Atlantic coast throughout Sunday.
Even President Barack Obama fell victim to "snowmageddon", as locals - including the president - have dubbed it.
A tree limb snapped and fell onto a vehicle in Mr Obama's motorcade, but no-one was injured.
All across the region, hundreds of car accidents were reported, but only two fatalities - a father and son who died while helping another motorist in Virginia.
US national rail service Amtrak cancelled a number of trains between New York and Washington, and also between Washington and some southern destinations.
The latest storm comes less than two months after a December storm dumped more than 16in (41cm) of snow in Washington.
I'm not going anywhere... The front door of the building I live in is closed shut
Debi Adkins Resident of Baltimore, Maryland
The Washington Metro was operating only on underground lines, and bus services were cancelled.
The usually traffic-heavy roads of the capital were deserted, and the city's famous sites and monuments were covered with snow.
Debi Adkins, who lives just outside the city of Baltimore, told the BBC: "I'm not going anywhere - I couldn't if I wanted to. You just can't get your cars out. The front door of the building I live in is closed shut, so I just can't get out."
Some sight-seers ventured out in thigh-deep snow along the famous national mall, or went cross-country skiing down empty boulevards.
Others took part in a huge snowball fight at DuPont Circle, a major Washington thoroughfare, organised via Facebook and Twitter.
US government offices in the Washington area closed four hours early on Friday, and forecasters warned of a difficult commute on Monday morning.
Washington's mass snowball fight
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