The polar vortex is beginning to stir, signaling the first signs of seasonal change. Here's when to expect the first frost in ...

As summer wanes in the Northern Hemisphere, scientists are sounding the alarm over what could be one of the most extreme ...

Summer may end on a cooler note for parts of the U.S., with meteorologists suggesting that a weakened polar vortex could ...

Prepare for a return of frigid weather in March—and April. Prepare for a return of frigid weather in March—and April.AFP—Getty Images Editor at Large You could be forgiven for not noticing that last ...

New Yorkers are already looking to winter and the question remains as to what kind of winter it will be - balmy or bitter?

Fans in Green Bay suffered through frigid temperatures, thanks to Arctic air that has come southPhoto by Ronald Martinez/Getty Images It’s polar bear weather today for much of the Midwest.

The polar vortex is stirring up, bringing the earliest hints that the seasons are changing. What does that mean for Vermont?

The past two days proved dismal for Cornell students and faculty, who battled freezing temperatures and wind chills of 29 degrees below zero across campus. As a mind-numbing polar vortex descends on ...