President-elect Donald Trump's second inauguration will mark the coldest presidential ceremony in more than 40 years.

The most unusually cold air in the Northern Hemisphere will be over the United States early next week, bringing dangerously ...

A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into ...

The polar vortex is a ring of cold air that typically circles the Arctic. A strong jet stream essentially acts like a fence, ...

A new blast of Arctic air sweeping from north to south will bring bone-chilling temperatures to millions of Americans this weekend and next week.

With temperatures expected to be among the coldest Inauguration Day in decades, officials have decided to move the swearing-in ceremony inside.

Americans were bracing Thursday for frigid temperatures that forecasters said could produce life-threatening conditions, with ...

A polar vortex dipping down from Siberia will bring a cold front with frigid temperatures to nearly 300 million Americans.

The polar vortex is a large area of low pressure and ... may experience temperatures below zero during the back half of January, The Washington Post reported. Before the extreme cold temperatures ...

A lobe of the polar vortex will swirl into the United States. (Video: Ben Noll/The Washington Post) Temperatures will dip dangerously low, reaching minus-20 to minus-30 in parts of North Dakota ...

Snow and winds are likely to disrupt traffic, trigger flight cancellations, and cause headaches for people traveling to D.C.