The teeth-chattering, bone-rattling cold is holding steady over the Bay State today thanks to wintry blasts sending wind chills even lower than Wednesday, forecasters said.

As of 8 a.m. today, all but two cities in Massachusetts had below-zero wind chills. Worcester saw the state’s most frigid wind chill of 21 degrees below zero, meteorologist Alan Dunham said. The state’s highest wind chill was one degree below zero in Chatham. There was only one place warmer, Westfield, which was balmy by comparison at 4 degrees, with winds too light for wind chill to apply.