Wintry weather is forecast to hold longest across the the Great Lakes, Northeast and mid-Atlantic.
Cold air masses and a few snowstorms will continue to impact the regions as late as March before the winter season comes to an end.
A steady stream of warmth may not arrive for cities from Detroit to Boston and New York City until mid- to late spring.
"For the next six weeks in the Northeast, we're going to be dealing with some pretty good cold coming down out of northern Canada," AccuWeather.com Lead Long-Range Forecaster Paul Pastelok said.
"I still think there's going to be a few systems of significance before the winter season is over with."
Similarly, snow and shots of cold air will persist across the northern Plains and Upper Midwest.