William J. "Bill" Karins (born April 14, 1974) is an American meteorologist, working for NBC News. He reports weekdays for NBC's Early Today, MSNBC's First Look, Way Too Early, Morning Joe, The Rundown with José Diaz-Balart and CNBC. Prior to being named NBC Meteorologist Karins was one of the original meteorologists for the now shuttered NBC Weather Plus. From 2009 to 2012, Karins had been the meteorologist on Weekend Today on Saturdays. Karins has also become one of the substitute hosts for Way Too Early since the departure of Willie Geist from the show for his Today hosting duties. He is also a fill-in for Al Roker on Today, and for Dylan Dreyer on Weekend Today.
Karins was born in Albany, New York. He is a graduate of the State University of New York at Oneonta, which is also the alma mater of ESPN's Sal Paolantonio and actor Bill Pullman. Prior to working at NBC, he was a meteorologist at KSNT in Topeka, Kansas and at WCTI in New Bern, North Carolina. Additionally, he also worked with former Maine State Representative Chris Greeley in Bangor for WABI-TV.