The station signed on the air in September 1948[3] as WISC-FM. It was mostly simulcast with sister station WISC 1480 AM (now WLMV). WISC-AM-FM were owned by Radio Wisconsin, Inc., with offices in the Commercial State Bank Building. WISC-FM was the second commercial FM station in Madison, going on the air a year after 101.5 WIBA-FM.
By the 1980s, the easy listening format was attracting mostly older listeners. To gain a younger audience, WISM-FM flipped to soft rock as "Movin' Easy 98 FM".[5] On December 1, 1983, the station changed its call letters to WMGN with the moniker "Magic 98".[6] The format switched to soft adult contemporary music. Over time, the tempo picked up and WMGN became a Mainstream AC station.
Christmas Music
WMGN is one of the few AC stations in the U.S. that do not switch to all-Christmas music for most of November and December. The all-holiday music format in Madison is heard on iHeartMedia’s 92.1 WXXM, Audacy’s 105.1 WMHX and non-commercial Christian Contemporary station 102.5 WNWC-FM, owned by the University of Northwestern – St. Paul. WMGN only switches to all-Christmas music a few days before December 25, calling it "The 98 Hours of Christmas", tying in its dial position.