Researchers at Argonne National Laboratory in southwest suburban Lemont are taking a close look at how that Arctic weather is ...

The arctic air will persist through at least Wednesday morning. Early Tuesday morning, wind chill readings ranged from -20 to ...

Tuesday is the coldest day so far this winter, but it was far from a record. The coldest temperature on the books for Jan. 21 ...

The cold is about to get even colder in the Chicago area, with another advisory set to take effect across the region Monday ...

Arctic cold gripped the entire Chicago area Tuesday morning, with "feels-like" temperatures near -30 degrees as extreme cold ...

The National Weather Service issued two advisories from 6 p.m. Sunday to noon Monday, and from 9 p.m. Monday to noon Tuesday.

Single-digit high temperatures are expected to hit the Chicago south, southwest suburbs, the coldest weather of year so far.

An Arctic blast will drop temperatures into the single digits by Sunday, with wind chills as low as -25 by Monday morning.

It was colder at times this week in Chicago than it was in the Arctic, and the connection goes beyond the comparison.

Prepare for an Arctic blast as Chicago faces bitter cold overnight, with temperatures plummeting near zero and wind chills ...

An arctic air mass settled over New York City and much of the country Sunday evening, bringing a deep freeze and the chance ...