The station signed on the air in 1959 as WFAW-FM, sister station to WFAW (940 AM). In the 1950s and 1960s, the two stations mostly simulcast their programming. WFAW-FM was limited in its power, not quite at 3,000 watts. It only covered Fort Atkinson and some adjacent communities.[5]
On July 6, 1981, WFAW-FM changed its call sign to the current WSJY.[6] WSJY had an easy listening format, with the "JY" in the call sign referring to the station's moniker, "Joy 107".
In the 1990s, as the easy listening audience was aging, WSJY added more vocals to its playlist. It eventually transitioned to a soft adult contemporary sound, largely eliminating the instrumentals. In the 2000s, the tempo picked up and the station made the segue to mainstream adult contemporary music.
In April 2024, WSJY's HD4 subchannel switched from a simulcast of WSJY's adult contemporary format to a simulcast of country-formatted WBKY 95.9 FM Stoughton. WSJY-HD4 now feeds FM translator W258CM 99.5 FM Madison (which switched from WSJY's adult contemporary format).[7]