AT 0850 CST, THE PLT GOT A WX BRIEFING FOR A FLT TO THE DUPAGE ARPT. AT THAT TIME, THE CURRENT DUPAGE WX WAS IN PART: PARTIAL OBSCN, 2 MI VIS WITH FOG; ALSO, THE PLT WAS GIVEN SVRL PIREPS FOR LGT TO MOD ICING IN SOUTHERN WISCONSIN. AT 1231, HE GOT A WX UPDATE. AT THAT TIME, THE DUPAGE WX WAS IN PART: 600' OVC, 2 MI VIS WITH FOG; THE FORECAST WAS FOR THESAME WX TO CONT WITH OCNL 1000' OVC, 4 MI VIS WITH FOG, BUT NO ICING WAS EXPECTED. AFTER ARRIVING, THE PLT MADE A VOR RWY 10 APCH, THEN CIRCLED TO LND ON RWY 28. THE TWR CTLRS RPRTD THE PLT MADE THE CIRCLING MANEUVER AT 50' TO 100' AGL, ALTHO THERE WAS A RPRTD 500' CEILING & 1-1/4 MI VIS WITH FOG. MINIMUMS FOR THE APCH WERE 500' CEILING & 1 MI VIS. DRG THE BASE TO FINAL TURN, THE ACFT IMPACTED THE GND & BURNED. AFTER THE FIRE WAS EXTINGUISHED, LEADING EDGE ICE WAS FND UNDER THE UNBURNED HORIZONTAL STABILIZER & ALONG THE WRECKAGE PATH. AT THE TIME OF THE PLT'S LAST MED CERT ON 4/6/84, HERPRTD A TOTAL FLT TIME OF 2200 HRS. THE RGT FRONT SEAT PAX WAS A RATED PLT; HIS MED CERT WAS DATED 4/15/82.