SXUS73 KFSD 160635 RERFSD RECORD EVENT REPORT NATIONAL WEATHER SERVICE SIOUX FALLS SD 135 AM CDT SAT JUN 16 2018 ...RECORD WARM LOW TEMPERATURE BROKEN AT SIOUX FALLS SD... THE LOW TEMPERATURE IN SIOUX FALLS ON FRIDAY WAS 77 DEGREES, WHICH BREAKS THE RECORD FOR THE WARMEST LOW TEMPERATURE ON JUNE 15TH. THE PREVIOUS RECORD OF 70 DEGREES WAS SET IN 1921. $$